Joanna Lumley's Britain

This week Joanna travels through Scotland and Northern Ireland. Starting in the Outer Hebrides, she explores the Harris Tweed industry and drives a herd of Highland Cattle across the sands at low tide to their winter grazing. Next Joanna heads to Eilean Donan Castle, the location for her very first episode of the New Avengers, where she strikes some Purdy moves as she scales the battlements.