Have flown across the pond many many times in BA's A318, 32 pax, flat beds, takes 5 minutes for everyone to board or get off - perfect. A little bit bumpy in winter on the eastbound though.
Flew a CO 757 GLA-EWR back in the day in Y which was less pleasant, CO handed out burgers for lunch, lady next to me asked for a vegetarian option and was told "just eat the bread."