The UK has many beautiful places to enjoy a staycation, but crowded beaches and busy cities can be less peaceful and more stressful.Britons planning a last-minute summer staycation could be more likely to unwind in Devon, with a new study naming Salcombe the UK's most relaxing destination.Interest in local breaks is staying high across the country, with "UK staycation" gathering more than 21,000 Google searches over the past month alone.The most…