[calling the public transport gurus, stut and Mizter T]

Legoland with the family next week, they will head home afterwards while I head to T5. Don't want to take two cars if we can help it, so what are the public transport options like? [family will head to M4 and then turn west, could drop me off anywhere convenient - Reading train station is not convenient in this sense ]. Times not fixed yet but I'd imagine that the kids will need to be kicked out of the park screaming when it closes, so any 'get dropped off by family' option would need to bear that in mind.

thanks