In the days of a 30 minute format the final IIRC of each series was 45 minutes long.
I was going to say I thought it got kicked out of its traditional 4:30pm slot by Deal or No Deal but it moved (as above) in 2003 to 3:15 and Deal didn't come along until 2005.
So before Deal or No Deal came along and sat in the 4:15pm slot and after Countdown was moved back to 3:15pm, what did Channel 4 put in the 4pm slot? Can't have been 15:1 because that ended around time Countdown was moved to 3:15 IIRC. Was it something Channel 4-ish like, I dunno, water painting or something? Wasn't Come Dine With Me, that didn't start until 2005.
It was the likes of Come Dine with Me, possibly Coach Trip, a renovation series called Room for Improvement and I think a kind of travel series called Home from Home. Most got axed when Deal came along and I don't think it was until Richard and Judy ended Come Dine with Me and Coach Trip were revived.
I don't think much rates for C4 in the afternoons now - they lost their afternoon niche by childrens shows ending on BBC1 and ITV.
I preferred the internet when it had a sense of humour.