If you come a day early George, you can get a direct train London King's Cross to York with minimal stops, I think travel time is a little under two hours.
It was a great day! I live not too far from York but the scavenger hunt made me see it in a new light! And I got to meet patchworkgandalf!! and lots of others too.
Note from the management... I banned an Upcoming member who was posting comments here, soliciting mail to Ghana, but who then suddenly changed it to Nigeria.