Former Tour de France winner Sir Bradley Wiggins is among the race favourites along with Nairo Quintana, second behind Britain's Chris Froome in this year's Tour.
This year's race starts on the Scottish Borders and will move through the Lake District, Snowdonia and Dartmoor before concluding with a showpiece finish in central London.
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Heavy rain and wind for Scotland and northern parts this weekend with an amber weather warning issued and travel disruption expected.
Heavy rain continues to affect Western Scotland and Northern Ireland
A surgeon linked to two deaths and a series of botched surgeries is to return to work despite an ongoing investigation, ITV News understands