The Duke of Edinburgh will be presenting medals to the Royal Marines at a private ceremony at Norton Manor Camp.
Our Somerset correspondent David Woodland is there:
More top news
It's looking drier this afternoon, but tomorrow and Wednesday will be cold, showery and blustery, followed by wetter, milder weather later.
A murder investigation has been launched after a woman was shot dead in west Somerset.
Drivers have been told to expect severe delays due to a fire causing damage to the northbound exit slip road at junction 2.