What's the big deal? When the pax paid for their tickets, they assumed risk and trusted in the skill of the pilots. Was there a mid-air? No. Was there going to be. No. Were the pilots formation qualified? At least some were. It was probably more dangerous getting to the airport than just going through with the photo op. In fact, I think all airliners should cross The Pond as a 2-ship.
I want my "hero" title too then. I had to take evasive action where some chowder head in a Bonanza said he had me in sight and was cleared to land behind me. The idiot appeared in my windscreen descending from above and to the right. He was close enough to count rivets. I got the call from the tower about the time we were banked about 80 degrees and dropping like a rock. Fun stuff.