In February 2015 I travelled to the UK. The 'travel website' said I didn't need a visa to stay for up to 90 days. I was refused entry but allowed to stay for 4 days with my friend there. I travelled back in June and the same thing happened this time I only planned on staying for a month. Same thing happened a grueling 6 hour interrogation and given 4 days to stay and sent back. I'd like to travel over again but would like to be assured of being allowed to stay for the time I choose before I make arrangements to fly over again. WHat if anything can I do to cover all my bases.