At my daughters house they had recorded a 1 hr Channel 5 Cop Show, while waiting for a delayed heating engineer to call, I watched it for something to kill the time, it was a 1hr show and with the adverts skipped it took it down to 45 minutes, but the show had a 4 minute lead in,showing you what's coming in the show, a 1 minute ending of what's on next time, plus another total of 2 minutes made up from after the advert break they would skip back to what you have last seen, so from 1 hour you have 38 minutes of content, now are they struggling to get advertisers, hence the long lead in and reviews after breaks, or is this normal these days, not having TV at home I don't know