Travel across London - how long will it take between these stations?

[paranoidmother]

I'm getting into Kings Cross / St Pancras Station at 21.19 (hoping the train is on time) and need to catch the 22.00 train from Marylebone on a Saturday evening.

Is 41 minutes enough time to get there ok? I've got DH, 2 suitcases and 2 DC (3 & 4 - who will be awake to walk).

Was going to take the Northern line or circle from Kings Cross to Baker Street and then change to Bakerloo Line to get to Marylebone so in all only about 4 stops.

Please help - it's the only bit of the holiday that might be a problem.

TIA

oh in that case yes it would probably make a difference. I'm assuming a family railcard is for a year. I would make an effort to use it if so as the kids love trains.

This is fantastic help thank you everyone

It's £24 for a year, and you can use it if you are going out with friends too. The only condition is that your party must include a child under 16, and that you use off-peak trains.

You have to buy at least one child ticket, but these are often just a couple of pounds.