yeah...i had same problem as I did the IR and CPL on the seneca, then they wouldnt let me fly SEP. So I quickly phoned some friends and found an airfield near the CAA at Gatwick and did a quick SEP skills test!! Submitted it the same day then as my licence application.
Not neccesary though, as you will only obviously need this to fly SEP commercially. You can still fly privately on an ICAO licence.
As for the MCC, try get the exemption! I am admittedly not sure as I had to do the MCC.
GOOD LUCK
