Sorry but that is not correct if you have no registered GP then you do not fulfil the criteria for a certificate, it’s stated so in the Chief Constables statutory guidance issued by the home office.Not strictly accurate.
The medical proforma must be signed by a General Medical Council registered Doctor. This can therefore be done via a third party such as ShootCert, provided they are given FULL LIFETIME medical records.
The Police certificate can be obtained via your friendly local FYI office!
Again BASC will provide assistance in dealing with the relevant Firearms Dept, and in getting the medical proforma.
Which part of the UK might you move to?
Some counties, such as Dorset, Gwent, and Gloucestershire have enormous problems, whilst others are relatively easy.
For without a registered GP where do you think a third party GP will obtain your medical history records from?