the $250 fee for the MEP test is notably similar to that fot a PPL skill test, where the fee in £ sterling is around £150, this is not a CAA fee, but paid direct to the examiner, like A PPL skills test!
hope this helps!
The CAA Scheme of charges is availiable here:
http://www.caa.co.uk/docs/175/srg_fc...es_prof_06.pdf for the Commercial Charges
http://www.caa.co.uk/docs/175/srg_fc...ges_ppl_06.pdf for The PPL (&MEP) ones