BBC - No adverts (maybe 2 mins of self-promotion between shows)
ITV/C4/C5 - 5 mins. per half hour?
Sky, and all other 'new' digital channels - American levels of advertising.
A lot of American shows, when shown by the BBC, are in 20 or 45min. slots rather than an hour, often with bonus programs afterwards like "Heroes Unmasked" to fill the time.







