Missionary Work is the 523rd episode of The Bill
As Community Liaison Officer, Ch. Insp. Conway has to decide which of two bids for a grant he should recommend to the Commissioner. He and P.C. Garfield want to use police funds to support a local youth club, while Ch. Insp. Cato and Ch. Supt. Brownlow have their own ideas.
Future Spice Girl Emma Bunton puts in an appearance. Her role in the episode was originally much larger, but all scenes apart from the closing moments were cut for reasons of timing. (Or because she wasn't very good, depending which version you read...)