Pan-pan pan-pan pan-pan
(Calling station) London Centre, this is (Your call sign) Golf-Alpha Bravo Charlie Delta (prefix Tyrone, if AN inexperienced pilot)
R(est) eason - Have suffered engine failure
I(n) ntention - Intend Forced Landing
P(eace) osition - 3 miles south west Billy Bong Airfield
L(ouis) evel - Decending through 2000ft
H(oi) eading - Heading 300.
I also understood if you wanted to be really flash, you could add no persons on board, fuel status, Experience.
Standing by to be corrected (especially on the spelling and entimology of LH!)