Brexit: How you can still sell your medical devices in the UK

Brexit was completed in January 2021. What was a cause for celebration for some means an additional burden for many - including medical device manufacturers. 

For manufacturers, it is important to understand which regulatory requirements they will have to fulfill and which transitional periods they will benefit from if they want to continue selling their products in the UK. 

1. Regulatory requirements after Brexit

a) UK law applies and therefore the EU directives!

The transitional period during which EU law was still applied in the United Kingdom ended on December 31, 2020. Since January 1, 2021, the law of the United Kingdom is applied, although it continues to be based on old EU law: 

The UK Medical Devices Regulations 2002 apply to medical devices, which in turn continue to reference the (old) EU directives, i.e.: 

  • Medical Device Directive MDD (93/42/EEC),
  • Active Implantable Medical Device Directive AIMDD (90/385/EEC)
  • In-vitro Diagnostic Medical Device Directive IVDD (98/79/EEC)

Manufacturers who have just switched to the MDR would therefore have to do a roll backward. The good news, however, is that the MDR requirements are rather the superset of the requirements formulated by the EU directives. 

b) Conformity assessment procedures and CE marking remain valid – for now

With the EU directives, the requirements for conformity assessment procedures and CE marking remain in place in the UK. 

Initially, the UK accepted the placing on the market with CE marking only until June 30, 2023. In the meantime, however, these transitional periods have been extended (see Chapter 2). Declarations of conformity according to the old EU directives as well as the MDR and IVDR, will be recognized. This means that manufacturers do not have to undergo an additional conformity assessment procedure during this period. 

After the transitional periods, manufacturers must undergo a UK-specific conformity assessment procedure. However, this does not result in a CE marking, but the UKCA marking, i.e., marking with the UK Conformity Assessed Mark

c) The notified bodies will be followed by the UK Approved Bodies

For UKCA marking, manufacturers must involve a UK Approved body. This corresponds to the notified bodies because the UK conformity assessment procedure is still based on the EU directives, at least until the UK enacts other requirements. The foundation for a fundamental revision of the current law has been laid by the Medicines and Medical Devices Bill, passed in February 2021. 

However, the UK is not free to change or even increase these specifications at will. The Brexit deal sets limits to this because the largely free movement of goods is only allowed if neither side uses regulation to close off the respective market. 

Because the UK requirements currently correspond to the EU directives, manufacturers of Class I products do not have to involve a UK Approved Body in the conformity assessment procedure. 

d) New is the obligation to register

However, manufacturers importing products into the UK must register them with the UK's Medicines and Healthcare products Regulatory Agency (MHRA)

The manufacturer is not allowed to carry out the registration. Rather, the UK Responsible Person is responsible for this. More information about this can also be found below. 

Further information 

Read more about medical device registration on the MHRA's pages

Also helpful is the Regulating Medical Devices in the UK page. 

e) Summary: 3 steps to approval in the UK

EU manufacturers who wish to market their medical devices in the UK must proceed as follows: 

  1. Find and register a UK Responsible Person. 
  2. Register their own devices through this UK Responsible Person. 
  3. Place the devices on the market in the UK. 

2. Transitional periods for the recognition of the CE marking

CE-marked medical devices can currently continue to be marketed in the UK. Accordingly, no additional UKCA marking is required. The following transitional periods apply: 


Applicable EU regulation

Transitional period

Medical devices with valid CE marking under the MDD or AIMDD Maximum June 30, 2028 (or until certificate expires) 
In vitro diagnostic medical devices with valid CE marking under the IVDD Maximum June 30, 2030 (or until certificate expires) 
Medical devices (including custom-made devices) and in vitro diagnostic devices with valid CE marking under the MDR or IVDR Maximum June 30, 2030 


With the end of the transitional period, the MHRA insists on going through the conformity assessment procedures under UK law with the involvement of a UK Approved Body

3. Required roles

a) UK Responsible Person

With Brexit, a UK Responsible Person has become mandatory. This person must be resident in the UK and registered with the MHRA. The UK Responsible Person must perform the following activities comparable to the authorized representative according to MDR and IVDR

  • Register devices
  • Act as the primary point of contact with the MHRA
  • Report information from the field to the manufacturer, including complaints, reports from users, patients and healthcare facilities, particularly regarding possible incidents
  • Assist with the implementation of field safety corrective actions and other corrective and preventive actions
  • Verify that the manufacturer has gone through a conformity assessment process
  • Make sure the declaration of conformity has been drawn up and keep it available
  • Make sure the technical documentation has been drawn up and keep it available
  • Provide the MHRA with a list of importers

If the UK Responsible Person suspects that the manufacturer is not fulfilling its legal obligations, it must resign its mandate and inform the MHRA and, if appropriate, the UK Approved Body

b) Importers and distributors

Importers must inform the UK Responsible Person about their activities. They can also assume this role at the same time. Distributors have no additional obligations to fulfill.

c) UK Approved Body

After the transitional periods have expired, all medical device manufacturers who wish to market their products in the UK must involve a UK Approved Body - at least if their products fall into Classes I*, IIa, IIb, or III. 

Currently, there are only four accredited companies, according to the UK government's website: SGS, BSI, DEKRA, and UL. 

4. Further requirements

a) General safety and performance requirements

Because the regulatory requirements for medical devices marketed in the UK continue to be formulated in EU directives, there are no different or additional essential requirements. This will change when the new legislation is introduced (probably in 2025). For an outlook, see this document from the MHRA

In the meantime, MHRA has started to formulate its thoughts on Human Factors Engineering. These are somewhat more closely aligned with the FDA's requirements than with those of the old IEC 62366. On the other hand, manufacturers who follow IEC 62366-1 should also meet the MHRA's usability requirements. 

b) UDI

Since the old directives did not require a UDI, this obligation does not apply in the UK for now. Of course, there is nothing to prevent manufacturers from placing devices on the market in the UK with a UDI. 

c) Quality Management Systems

The requirements of the MHRA for the QM system do not differ from the corresponding requirements in the EU. Here, too, ISO 13485:2016 or the requirements of Annex II of the MDD, for example, are authoritative.

d) Post-Market Surveillance & Vigilance

The requirements for vigilance have always been specific to individual countries, e.g., regarding the format, deadlines, and recipient of vigilance reports. 

MHRA provides assistance on vigilance and further guidance on its website. The authority continues to rely on MEDDEV guidance, specifically MEDDEV 2.12/1. 

Either the manufacturer or the UK Responsible Person is responsible for notifications. 

Similar to the transition from MDD to the MDR in the EU, requirements for post-market surveillance (PMS) will need to be applied before the new legislation becomes effective, despite transitional periods. This is planned for mid-2024. You can get an insight into the new PMS requirements on the corresponding MHRA website

5. Special case Northern Ireland

The situation is particularly complicated for devices that are to be marketed in Northern Ireland. These are not subject to British law but to EU law. This means that the MDR and IVDR will apply in Northern Ireland from May 26, 2021, and May 26, 2022, respectively! 

Thus, according to the current status in Northern Ireland, the obligation for CE marking remains even after the transitional periods. However, a UK Responsible Person is still required who is responsible for the registration of the devices in the MHRA database, among other things. 

An exception to the obligation to have a UK Responsible Person applies to Class I devices, custom-made devices, and other IVDs that have already been registered in the EU. 

Another special regulation concerns the label: If a UK Approved Body is involved in the conformity assessment, then the UKNI label is required in addition to the CE marking. However, the combination of both labels is only intended for the Northern Ireland market and is mandatory in this case. Within the EU, only the CE marking may be used. Additional application of the UKNI label when placing on the market in, e.g., Germany, is not permitted.


In addition to the CE marking, device manufacturers also need to apply the UKNI marking if they choose to use a UK Notified Body for mandatory third-party conformity assessment. Device manufacturers must never apply the UKNI marking on its own – it must always accompany a CE marking. To place goods on the EU market, manufacturers must use the CE marking on its own, without the UKNI marking. Goods bearing the “CE & UKNI” marking will not be accepted on the EU market.

MHRA Website 

Read more about the special arrangements for Northern Ireland and the UKNI marking in communications from the UK government (PDF). 

6. Requirements for UK manufacturers

For British manufacturers who want to place devices on the market in the EU, European regulations such as the MDR apply. This means that they will need an EU-notified body and an EU-authorized representative as early as 01.01.2021. Devices that have already been placed on the market in the EU before 01.01.2021 may continue to be made available and put into service there. 

If UK manufacturers wish to market their devices in Northern Ireland, they will need an EU-authorized representative based in Northern Ireland. 

7. Conclusion

As a result of Brexit, there are no winners, at least in the world of medical device manufacturers, but (almost) only losers. 

Loser 1: British patients

If MDR and IVDR were to fulfill their promise to increase the safety, performance, and benefits of medical devices compared to the previous directives, then UK patients would lose out. This is because, in the UK, for now, devices only have to meet the "old" requirements of the EU directives. 

Loser 2: The British healthcare system

Placing on the market becomes more burdensome for EU manufacturers. 

  • An additional role, the UK responsible person, has to be created.
  • When the transitional periods expire, EU manufacturers will have to go through a second conformity assessment procedure. 
  • They will then need (depending on the class) a UK Approved Body in addition to the notified bodies. 

This additional effort must be paid for - ultimately by the UK healthcare system. Or the manufacturers decide to no longer market their devices in the UK. In that case, they will be missing from the British healthcare system. 

Loser 3: The EU manufacturers

For the EU manufacturers, this means the additional effort described above for registration, the additional conformity assessment procedure, and the additionally required UK Approved Body

Loser 4: The authorities (EU and UK)

No matter if customs authorities, MHRA, or European authorities are responsible for market surveillance: All of them have an additional bureaucratic effort that does not bring additional safety. On the contrary: redundant or additional and unnecessary tasks keep the authorities from fulfilling their actual duty. A duty that is already obviously more than challenging. 


"Take Back Control" was one of the slogans of the Brexit supporters. The output is that the UK is operating with outdated regulations. That these are EU regulations seems like a staircase joke of history. 

Good medical devices are good medical devices. Therefore, the objective should be to create uniform regulations worldwide. Brexit was, unfortunately, a path in the opposite direction. But so was the MDR with the concept of common specifications and the harmonized standards that are still missing today. Harm. 



Benefit from Johner Institute's help to meet the UK requirements for medical devices in compliance with the law and with minimal effort. 

We support you in registering your devices with the MHRA and assuming the UK Responsible Person role. 

Our experts will also assist you in preparing and reviewing all necessary documentation. 

Contact us! 

Find out what Johner Institute can do for you

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