Long shot. ID a Caledonian Tristar.
As far as I can tell, Caledonian Airways (BA) had a fleet of 19 L1011s in 1994.
What do the assembled brains think are the odds that just one of them would have regularly flown UK to Athens in August of that year?
I have no idea how any airline (and they all have possibly different strategies) allocates aircraft to specific routes.
The reason that I'm asking is that, for very personal reasons, I'd like to do my best to identify the actual airframe that I flew on with my daughter that year.
Airliners.net only has G-BBAE at Athens and BBAF at Rhodes, in unspecified years.