The A590 in both directions is blocked - queueing traffic due to a jackknifed lorry at B5271.
Snow is also affecting traffic along the whole of the A590. It is particularly bad towards Kendal.
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The 12.5 hour walkout by 63 GMB members got under way at 6am this morning and will continue until 6.30pm this evening.
37-year-old Graeme Haddon pleaded guilty to the offence which happened in his home village of Lamancha near West Linton at the weekend.
Laura Price was dragged into an alleyway, close to Penrith Leisure Centre, where she had her head jumped on and kicked "like a football".