It’s Christmas and doesn’t Santa know it. He’s inundated with demands – but there are some things he can’t give. Like blood.

So this December, W+K is encouraging its employees, clients and passers-by to donate blood.

With donations dropping by 20% over the festive period, it’s the perfect opportunity to get back into Santa’s good list in the nick of time and, perhaps most importantly, save lives.

We’ve put up a Christmas tree in our Hanbury Street window that encourages people to donate. When they text us their postcode, they’re sent details of their nearest donation centres, and more life is pumped into our tree.

The tree is built entirely out of plastic tubing, constantly pumping with liquid. After it’s ‘activated’, the blood bag begins to drain, LED lighting flows through the branches and a Christmas jingle is heard.

The installation is up in our Shoreditch office until the 30th of December.

Wherever you are this Christmas, give the greatest gift you can, give blood.

Merry Christmas from Wieden+Kennedy London.