I believe Ant & Dec's Saturday Night Takeaway was originally LWT.
Although it's always been made at The London Studios, it was originally a Granada production - indeed the format was devised by a Granada researcher as part of a drive to encourage staff at all levels to come up with programme ideas. Although by that point Granada and LWT were pretty much interchangable.
I was going to ask about shows stripped across the week in the days of the London split as it's a relatively new thing in primetime, but then obviously Corrie aired across LWT/Carlton and the likes of Home and Away did as well and I guess Crossroads before it.
Going way off topic here but how did they handle the likes of Blockbusters, which regions would often show at their own pace. Easy enough if just Thames/Carlton showed it, but if LWT wanted to air it on Fridays or indeed the weekend I guess they had to be in sync.
At the turn of the century, ITV very frequently showed two-part dramas on a Sunday and Monday, which had the benefit of ensuring both Carlton and LWT would benefit. Of course after 1993 it wouldn't be an issue because the ITV Network Centre was now in business and they were able to schedule programmes for whatever day they wanted, hence The Clive James Show was a Carlton production on the weekend as early as 1995.
Thames and LWT showed Blockbusters in the same week very frequently in the eighties, LWT often showed it on Saturdays. Obviously common sense prevailed in this instance.