Returning from holiday as an SLF last night, into LGW, I had been given seat 12C, in an exit row. On boarding the flight I was astonished that the guy who was already seated in 12A was...shall we say...exceedingly large (visualise the shape of a water butt)...and after sitting there for a few minutes thinking how would he actually fit through the window, I tactfully asked him if he was happy sitting next to the emergency exit window. Half expecting a thump, he just said "yer mate I allwiz sitin dis row, can't fit in uverz". Cabin crew brought him a belt extension and looked at him but didn't say anything, and no briefing given to our seat row on use of exits.
Something needs to change. PS. Not Jet2