Flash Point - Donnie Yen (2007) - West Island School, Pok Fu Lam

The scene where Ma is practising with the Police band appears to have been shot in one of the halls at (the old block of) West Island School. I suspect a bit of refurbishment has gone on since then though. If you look at this image on wikimedia, you can see that this location was on the top floor of the old block. The glass pyramid-shaped skylight in the rear appears to have been removed in modern images.