Fred and George Weasley in the background
The last picture shows Woods running after his mate's car. The building in the backghround is still around, it's the Po Sing Court on Shek Ku Lung Road. It was built in 1967 so fairly new (and clean!) when this film was made, however, since then it has had the Regal Oriental Hotel built right in front of it and is hard to see from the road these days.