Free Christmas: Lights
Head down to Oxford Street on Tuesday 12th November to watch the lights go on - Special guests Jessie J, James Arthur and Connor Maynard will be this year's stars to perform and press that big red button.
If you can't wait that long the Regent Street lights will be turned on by Emma Bunton and Melanie C at 3pm on Saturday 9th.
Also worth a look is the Year of the Robin theme taking over Carnaby Street from 14th November, and you can't get classier than the twinkle at Sloane Square.
Free Christmas: Markets
Even if you're not going to buy anything, Christmas markets are worth it for the smell alone.
Hyde Park's Winter Wonderland has its fair share of paid for activities, but as the name suggests it's also just a magical, sparkly, festive fun land.
Imagine if Christmas threw-up somewhere near Marble Arch...in a good way. It opens on 22nd November.
From mulled wine to German sausages, walk around South Bank market, from Friday November 15th - Tuesday December 24th.
You also can't help but feel sick with festive cheer at the market in Covent Garden.
Free Christmas: Shop (windows)
In the spirit of keeping this a free expedition, you may think it best to avoid shops. But no one said anything about the windows!
London department stores have been putting the "OMG that's so Christmassy I could just cry" into their festive window displays for years.
And they don't disappoint.
Visit Fortnum & Mason for a traditional taste of old school Christmas - take a look inside - it's wildly expensive but will get any eager elves giddy with excitement.
For another nod to traditional there's always Harrods or Hamleys.
Known for their amazing creativity, Selfridges windows are set to be as impressive as ever this year.
Free Christmas: Carols
For the singers among us, Christmas can be an especially fun time.
If the thought listening to a carol makes you feel all warm and fuzzy inside why not head down to Brixton Windmill on Saturday 14th December for visit from Santa, a carolling session as well as, of course, Mulled wine.
Trafalgar Square is also set to be home to more than 50 groups getting their sing-song on. From 9th-22nd December, there'll be Carol Singing beneath the tree. It will take place between 4pm and 8pm on weekdays and 2pm to 6pm on weekends.
Free Christmas: Trees
Trees! Needless to say you'll find a tree or three at all of these places across the city.
One that might be worth visiting specifically is the designer special at Claridges Hotel - put together by Dolce and Gabbana this year - which will be unveiled on 26th November.
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