we would like to book National Rail Express from London Stansted Airport to Bath.
The time schedule is depart from STN at 7.15am and arrived Bath at 10.39 am with 2 changes. Train depart from Stansted at 7.15am, 8:01am arrive
Liverpool street ,8:01am depart from liverpool, 9am arrive at Paddington, and again 9am train depart to Bath.
my question is: why the ticket schedule are so tight? if i buy the ticket, do i have time to run to another platform to catch another train? or i should buy the ticket separately ?