Until the 1960s the piers at Weston-super-Mare, Clevedon, Portishead and Minehead were served by the paddle steamers of P and A Campbell who ran regular services to Barry and Cardiff as well as Ilfracombe and Lundy Island. The pier at Burnham-on-Sea was used for commercial goods, one of the reasons for the Somerset and Dorset Joint Railway was to provide a link between the Bristol Channel and the English Channel. The pier at Burnham-on-Sea is the shortest pier in the UK. In the 1970s the Royal Portbury Dock was constructed to provide extra capacity for the Port of Bristol.