London tourist attractions - Where to buy cheap family tickets?

[Jzee]

Family of 5 coming for Christmas and looking to see all the expensive sights so any suggestions would be welcome.

One Railways usually does a buy 1 get 1 free for quite a few of the attractions as well as theatre tickets and meals if you show a train ticket. Details are usually on their website.

Rail operators have a leaflet with 2 for 1 vouchers , also http://www.londonpass.com/prices.asp London Pass may be good value as it offers free entry etc and can be linked with a travelcard, other suggestions here hth

sorry, second linkLondon Pass