I did a few trips on Comet 4B with Dan Air / Air Tours and BEA though not many maybe 4 or 5 in total mostly into Europe, and as others have said we often ended up with table seat as a family. They did feel quite narrow after the 707-320c which were like Justapax1 my chariot too and from school with BCAL. Trident flights were all on Trident 3, and the thing I seem to remember was noise externally, though not internally, and a steep take off angle. I remember on my first Trident flight the BA inflight magazine listed their then Fleet of all British made A/C, Comet, Trident, BAC 1-11, Vanguard, Viscount, Argosy with only the Sikorsky Helicopters for Channel Island route being none UK manufacture. Not sure on the date but the paper was Blue behind the silhouette's of the A/C, and if I was guessing it would be 1971 and it was down to Palma as we had bought a house / ruin on the island. New Blue Union Jack Livery outbound which looked very futuristic at the time, and old livery with BEA Red Square on return.
I managed to get a short cockpit visit both times accompanied my Father. Both crews were quite surprised when I started discussing long haul flying at age 11 on 707, and when my Father said I did this largely on my own they were even more surprised, though a member of CC did say that she could not bare to think of sending a child so far away from home at my age. It just seemed normal to me, as there were quite a group of us like Justapax 1 who did it. My BCAL bag disappeared years ago, along with log book alas.
It is funny what you remember with clarity with age, but other things just slide by unnoticed or remembered
Cheers
Mr Mac