It's Sometimes..... Here's a snippet from their website....
Why is "Sometimes" called "Sometimes (Lester Piggot)"?
Lester Piggot is a famous British horse jockey. According to Tim in an interview on MTV's 120 Minutes around the time Laid was released, the band referred to the song as "Lester Piggot" while they were writing it because of its "racing beat".
The other one I thought it was before reading their site was Born of Frustration as it's one where they're on teh megphone alot and know that one does....