I need to get to tottenham road to do this i am taking the car to portsmouth and southsea and will arrive there at 12:45 and then get on the 12:50 train to london waterloo which will arrive at 2:20 i will then get on the underground on the northen line to warren street and then walk from there, the underground runs every 3 minutes and take 18 minutes to arrive at warren street.