I've just been to the Santa's Wish Kingdom in Westfield Shopping Centre and is just brilliant.
I normally take my kids to Harrods every year to see Santa, but did not manage to get the tickets this year so instead we went to this one and it was incredible.
Spectacular Santa's Grotto in 3D Animation
Your experience will begin with a magical 3D journey where sparkling wisps of 3D Colour and enchanting 3D special effects will whiz you off to Santa's beautiful Lapland Palace.
Your kids simply will love this, the way Santa, your kids and you interact with the 3D movie is excellent. They also give nice gifts to the kids.
I have taken my kids to see Santa so many times over the years but this has been by far one of the best if not the best.
I hope you get a chance to go and enjoy this experience. You will not regret it.
Also the shopping centre is very nice with so many shops for everyone.
I managed to book the tickets onsite which seems to be very difficult, but you can also book them online. This is FREE you just pay for the pictures at the end if you want them.http://www.wishticket.com/chp/westfield/westfield.aspx