Just send a Direct Message to @AlderandAlder on Twitter, or email jonathan@alderandalder.co.uk - first reply with the right answer wins... Come on, what are you waiting for!
This is important: Don't tweet the answer in the open - so everyone can see it - because you will be disqualified: We won't be able to include any entries received after that in the 'grand prize'. You can find out more about the Alder and Alder Advent Quiz here.
The answer to yesterday's letter
