Festive stuff to do in London (preferably free)

[Crunchymum]

As usual I've left things really late and cNt book up (I really fancied Kew this year, although the cost is eye watering)

Any suggestions for free or relatively inexpensive things we could do? Anything going on along the Thames? We are happy with lights and window displays. Doesn't have to be fancy.

can't*

Sky garden. Pre book but free.
Walk around Christmas markets.soho has some beautifully decorated bars , watch the skaters at Somerville house

St Pauls has free carol concerts (some are free but you have to book a ticket first): www.stpauls.co.uk/whats-on

There's also a Christmas market by the river at Southbank www.southbankcentre.co.uk/whats-on/winter-market?eventId=925011

and one at London Bridge, plus you can wander around Borough Market.

Winter Wonderland does free off-peak entry

Fortnum and Mason is worth a look for their window displays. Inside is probably carnage though.

The 139 bus! secretldn.com/most-christmassy-bus-route-london/

Go past Harrods with its Dior windows and gingerbread house style

Lights in Piccadilly /Chelsea -?sit on top of bus