you may have problems...
https://www.caa.co.uk/Commercial-ind...te-or-licence/
it's the bit in blue that says
Please note: The UK CAA has been advised by the German Authority (LBA) that, due to German national law concerning Data Protection, the LBA are unable to facilitate the transfer of pilot medical records from Germany to other States. It is therefore not possible to proceed with transfers of State of Licence Issue from Germany (LBA) to the UK (UK CAA), or indeed any other state, as the whole certificatory medical record of pilots must be held by the state to which a licence is transferred. Please note that German pilots’ licences are fully valid in all EASA member states.