I was on BA042 CPT-LHR (G-CIVD) last January when some 2hrs out of CPT the oxygen masks dropped. It was startling!
I was sat in the UD and first thing I noticed was there were four masks/seat pair, so plenty of choice
With the auto cabin announcement blaring, the next thing I noticed was the cabin crew had gone ....back to stations of course....and there was an eerie silence in the cabin (save the auto announcement) and lots of swinging masks
15-30 seconds or so have passed and I have still not donned my mask (young son and missus in row ahead have. Indeed my son put one on his fluffy dog...great picture!) but I was waiting for the nose to shove down....rightly or wrongly, I thought I'd wait
It never happened. After maybe 5 minutes crew emerged and began to engage with the passengers....understandably there were some a little upset
After 15 mins Captain popped up on PA announcing deployment had been a technical fault
I finished my cheese and port and we carried on our merry way to LHR.
On arrival in the morning the lower deck looked like a jungle canopy with all the masks hanging down