You can't go to the CAA at Gatwick anymore anyway...
Important Notice
https://www.caa.co.uk/Commercial-ind...edical-Centre/
if the link doesn't work it says..The UK CAA Aeromedical Centre will be closing on the 29th February 2016. All initial EU Class 1, 2 and Euro Class 3 medicals are fully booked. For initial Class 1 and Class 3 medicals please contact one of the other AeMCs. For initial Class 2 medicals and any classes of revalidation or renewal medicals please make contact with another AeMC or use our database to find an Aeromedical Examiner (AME) near you.