On Dec 28 I and a friend are travelling from Salisbury to Peterborough. We have Advance Std Single tickets (route EC & connecting) and seat reservation tickets for 3 trains. As they are advance tickets, we are committed to the trains departing Salisbury at 17.47, Basingstoke at 18.39 and Kings Cross at 20.30.
I assumed that from Basingstoke we would travel to Waterloo (arrive 19.39) and then by tube to Kings Cross, but I see the reservation from Basingstoke is only to Clapham Junction, and when I recheck the itinery using the East Coast planner, I see that we are supposed to change at Clapham Junction and go forward to Vauxhall and by tube from there. If I set via Waterloo in the planner, the itinery then gives a later departure from Kings Cross, presumably because 51 mins is deemed insufficient to make the connection. If we change at Clapham Junction we are supposed to arrive at Vauxhall at 19.41, giving only 49 mins. but it is a direct route by tube from there.
So my question is, is it indeed quicker to change at Clapham Junction and Vauxhall, and if so what platforms do the trains to Vauxhall leave from, or is 51 mins ample time to transfer if we take the simpler option of going through to Waterloo?
I assumed that from Basingstoke we would travel to Waterloo (arrive 19.39) and then by tube to Kings Cross, but I see the reservation from Basingstoke is only to Clapham Junction, and when I recheck the itinery using the East Coast planner, I see that we are supposed to change at Clapham Junction and go forward to Vauxhall and by tube from there. If I set via Waterloo in the planner, the itinery then gives a later departure from Kings Cross, presumably because 51 mins is deemed insufficient to make the connection. If we change at Clapham Junction we are supposed to arrive at Vauxhall at 19.41, giving only 49 mins. but it is a direct route by tube from there.
So my question is, is it indeed quicker to change at Clapham Junction and Vauxhall, and if so what platforms do the trains to Vauxhall leave from, or is 51 mins ample time to transfer if we take the simpler option of going through to Waterloo?