Right, DONE4 issued, ready for departure Am into IST on BA 676 on 26 Mar, and back out again in a more comfy seat on 677 about an hour later. Check-in will be tight, but fingers crossed should be OK -- have emailed to BA IST what I'll be doing, so hopefully they'll be prepared to hand over the tix straight away, rather than having to figure out what to do under pressure.

Thanks to Gardyloo for blazing the trail + getting the IST staff onside; very professional, courteous and helpful throughout. Can you sort out the BA NA RTW desk to be half as good???

Cheers all -- trip report when I get back to LHR in 3 weeks, assuming I'm successful.

Chris