That is a long journey. I have done that trip many times but never had to look forward to the 6 hour bus to Cornwall.
There are loads of places to visit in the UK. Orkney Islands way up top I recommend in the warmer months. Not too far is Cardiff is a really interesting city. Liverpool I love. Snowdonia and Nth Wales region for the scenery and castles. I could go on and on. Surely you have been to St Micheal's Mount down near Penzance?
Yes I've been to St Micheal's Mount! I've done a lot around Cornwall and haven't really ventured further unless it was to an airport. Orkney Islands sound great, we are hoping to head North during Summer. Thanks for the recommendations!