Bensmum - if I were you I would definitely take up the offer from Aimsmum. Yes it s a 10 minute walk - but that's quite a long way in a city centre if you have 3 kids and luggage and dont know the way and are stressed about getting lost or missing the train. Esp if your kids have no traffic sense like mine so you have to hang onto them for dear life. Which I suspect they dont, knowing where you live....
Or splash out on an taxi.
Dont mean to be a pain - I just know that connections are the most stressful part of a journey