I had a chef ask me today if his AMSA issued medical ertificate was accepted by UK MCA..
So I did some delving and yes AMSA certs are on the accepted list.
So am sharing the link to the UK list of acceptable countries..
Countries whose Seafarer Medical Certificates are Accepted as Equivalent to the UK Seafarer Medical
Fitness Certificate (ENG 1) and the list at https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/832365/MSN_1815__M_F__Amendement_3_countries_whose_seafarer_medical_certificates_are_accepted_as_equivalent_to_the_UK_seafarer_medical_fitness_certificate_ENG_1.pdf