THOUSANDS of people are taking part in the 10th Blenheim Palace Triathlon this weekend.

Participants will be swimming across the lake in the grounds, then cycling and running around the palace.

There are two routes – the shorter route is a 400m swim, a 13.2km bike ride and a 3.1km run, whereas the longer route consists of a 750m swim, a 19.8km bike ride and a 5.7km run.

Among those taking part is Radiohead bassist Colin Greenwood, who is part of the charity team Scarlett’s Dragons, who are raising money for Leukaemia and Lymphoma research.