Is the requirement for an FAA commercial certificate holder visiting UK and wishing to fly a UK registered aircraft that the pilot have a UK class 2 or an FAA class 2 medical?

An FAA third-class medical is sufficient for the validation mentioned in post 4.

Art 8 para 3 in Commission Delegated Regulation (EU) 2020/723—
UK version at: https://www.caa.co.uk/uk-regulations...gm-cs/aircrew/

"[...] the CAA may validate a licence which is equivalent to one of
those referred to in paragraph 2 [a PPL, Balloon Pilot Licence, or a
Sailplane Pilot Licence] and issued in compliance with the
requirements of Annex 1 to the Chicago Convention by a third country
for a maximum of 28 days per calendar year for specific non-commercial
tasks, provided that the applicant complies with all of the following
requirements:

(a) holds an appropriate licence and medical certificate and
associated ratings or qualifications issued in accordance with Annex 1
to the Chicago Convention;

(b) has completed at least one acclimatisation flight with a qualified
instructor prior to carrying out the specific tasks of limited
duration."

Well that's looking a bit more reasonable, thanks.

Genghis,

>I can't exercise my 61.75 in the USA without a class 1 or class 2 either.

Or you can simply get an FAA class 3? that works.

Selfin, whilst I agree with you about the FAA class 3 being usable / 28 days etc - are you able to point to anywhere where the CAA do admit that a FAA class 3 is ICAO compliant ? I have seen discussions that suggest otherwise.

Also the OP will still have to apply for verification of his FAA certificate/medical as part of the process.

I'd be tempted to suggest reviving their brown licence if it is a lifetime one and getting a LAPL medical

Explanatory Note to Official Record Series 4, No. 1228. UK CAA.
Published on 27 June 2017. Superseded on 8 April 2019.

Although UK exemption E4433 enables FAA licence holders to fly using
FAA Class 2 medicals, it has since become clear that the Class 2 FAA
medical is more akin to an EASA Class 1 and that the FAA Class 3
medical is the closer equivalent to an ICAO Class 2, which is the
minimum medical expected for the purposes of recognizing Third Country
Licences in Annex III (4) (d) of Part-FCL. It is also clear that the
general exemption made available by EASA, with the European
Commission’s agreement, permits FAA licence holders intending to fly
non-commercially, using private FAA licence privileges, to continue to
do so using Class 3 FAA medical certificates. UK medical opinion
indicates that such Class 3 FAA medicals are broadly equivalent to
ICAO Class 2 medicals.

Further, the United States AIP GEN 1.7 (Differences from ICAO Standards, etc) states for annex 1 chapter 2 reference 2.3.1.4:

U.S. private pilots required to hold an FAA Third-Class medical
certificate must meet the requirements of an FAA Third-Class medical
certificate which are equivalent to ICAO Class 2 with exceptions
specified in Chapter 6.

The same is true for the Canadian Category 3 medical which is equivalent to an ICAO Class 2 Medical Assessment.

If the UK licence is valid they can fly in the UK on a PMD, no need for a medical certificate.