Alright, on Saturday nights on BBC1 in 1999:

starting in Febr. at 9 PM "City Central" police series, until May.

when that ends Jonathan Creek.

3-part drama series "The Passion"

Brit. action series "Bugs" later that year,

Dalziel and Pascoe again, series "The Airport"

8 PM always Casualty

and lots of films.

So I would say http://www.imdb.com/title/tt0147756/ or http://www.imdb.com/title/tt0111904/ is your best bet.