I have been taking the flight for many years and it comes off the schedule for a few weeks each year, it also for whatever reason doesn’t alway fly on Tuesday, I think it coincides with Easter break in the uk and the planes are used for fl routes. On sitting over night it is a very business heavy route and the last flight out of London is usually pretty full, you can get a full day of meetings in and get back, the plane does sit overnight but goes out full in the morning and is business heavy. I try to take the morning flight out of Bos get into my hotel sleep, have a day of meetings the next day and fly back, so 238 239 back, I see a lot of the same people so I am guessing many do the same thing,