FF - I would request something along the following lines G-XXXX 1,500, 1016, overhead mike, india, delta, would like to climb 2,400, IFR and IMC, routing direct charlie, papa, tango, request a radar information service. Ideally if I hadnt got the RIS I would like it before going IMC.
Of course the call would vary depending on whether a RIS was available and do doubt thats another whole can of worms!!
Thats sticking my head above to be shot down by someone