Not knowing a thing about random number generators, I found it easier to write all the names on bits of paper, fold them up and bung them in a cereal bowl
then, to make it random and unbiased, I asked the old man to pick one of them out
and here is the winner
well done Elaine, your prize will be in the post in the next couple of days, and unless you've recently moved without telling anyone, I already have your address.
Thanks to all who entered, and better luck next time to the non-winners.