During the end credits, we see footage of a home movie taken during a birthday party, which also happens to be the birthday party that both Bridget and Mark are at that is referred to several times during the movie.
The European and Australian version of Bridget Jones's Diary does not contain footage of the birthday party during the credits. Instead, it has interviews with Daniel Cleaver (twice), Mark Darcy's parents, and the boss at 'Sit up Britain'.
After "The End" appears, it's crossed out and "The Beginning" added.