Thanks to all that have bought the quiz so far. Putting it on-line was a bit of an experiment so your comments about multiple entries are very useful.
Unfortunately, it isn't viable to number the downloads but I get a notification when anyone buys one, which gives their e-mail and IP addresses. All possible winning entries will be compared to the list (it will be easy enough to do this by sorting electronically or even manually, where necessary) .
I have now added the following note to
http://www.hospice-at-home.co.uk/quiz.htm:
"Please ensure that you enter the same e-mail address on the completed form as the one used when buying the quiz as, if yours is a possible winner, the two will be compared."
The closing date of 31st May has also been added.