Sorry GoneWest, I didn't realise it was a serious answers wanted!
The UK R/T book (CAP 413) says
5.1 The emergency message shall contain the following information (time and circumstance permitting) and, whenever possible, should be passed in the order given:
a) ‘MAYDAY/MAYDAY/MAYDAY' (or ‘PAN PAN/PAN PAN/PAN PAN');
b) Name of the station addressed (when appropriate and time and circumstances permitting);
c) Callsign;
d) Type of aircraft;
e) Nature of the emergency;
f) Intention of the person-in-command;
g) Present or last known position, flight level/altitude and heading;
h) Pilot qualifications (See Note 1), viz:
i) Student pilots;
ii) No Instrument Qualification;
iii) IMC Rating;
iv) Full Instrument Rating.
i) Any other useful information e.g. endurance remaining, number of people on board (POB) etc.
NOTES:
1 There is no ICAO requirement to include pilot qualifications in a distress message. However, this information should be included whenever possible in UK emergency messages as it may help the controller to plan a course of action best suited to the pilot's ability.
As far as I know the only difference from ICAO is that described in the Note. If your question is in preparation for the ATPL exams I believe that these are set against ICAO Standards. I think it's Annex 10 you need for the definitive answer.