Turned away from St Michael's Mount, Cornwall. Visited St Michael's Mount, Cornwall in May. Visit was part of a long coastal walk. Tide was out so able to walk across causeway to the Mount. On arrival, told we couldn't get in as we hadn't booked online. Dejected, walked back to Marazion. Checked NT website for St Michael's Mount and found there were places available for visiting at the time we were turned away. Booked tickets online and returned to the Mount where we were greeted by another member of staff who told us staff have a contingency for visitors turning up without tickets - if there are places available, they check you in then and there. Was asked if I wanted to speak to a 'manager' and was taken into an office and spoke to someone who didn't introduce herself or explain her role. I shared my annoyance at being turned away and said I would complain to HQ and share my experience online at which point I was asked to leave. I used NT's complaint procedure and got a reply saying my complaint had been directed to staff at St Michael's Mount. Guess what? Nothing from St Michael's Mount. It seems to me the National Trust has lost its way. My membership card boasts, 'for everyone, for ever' which seems hollow given my experience.