We had the full informative tour on outbound to FRA yesterday. This was not just a walk round but came with genuinely interesting information. Upon landing at LHR we were invited to tour the flight deck and have a sit down therein, again most interesting.
Both flights, particularly the outbound, were very lightly loaded. I could only see one outbound passenger in the entire centre block of CE and there were a good number empty spaces along the flanks. On the walk through even the few Economy passengers that could be seen would have made an A320 appear half empty. It was a ghost flight, I imagine because people are probably balking from travelling to Germany at present due to its sudden record cases of covid.