Yes I was just fielding the question on loss of comms and Talloway is spot on with the ICAO/Doc4444 book answer. That's what ATC expect us to do wherever we are in the world unless a regional agreement overrides that.
The dilemma of launching off to some far flung place and losing comms has always been at the back of my mind and no you wouldn't want to continue to follow the filed flight plan for 10 hours, or even one hour, but if you are IMC then you have no option. At the very least they know where you're going. Hopefully at some point you'd get VMC and land at the nearest suitable airport and 7600 should get noticed. My first post was just looking for an ATC input, some revised procedure etc. So thanks for your replies.
Incidentally the Easy Jet A319 not only lost comms but lost all flight instruments, transponder and TCAS (the latter for 10 minutes)
Airbus faces demands for A320 series electrical systems improvement following EasyJet report