Thanks for the witty answers, but I slipped up. My question should have read: "Are there online tables or calculators which show what �1 was worth in any given year?"
I found:
http://www.johnowensmith.co.uk/histdate/moneyval.htm
but it only does every 10 years.
Sorry about my not-so-funny (but true) first response. Have a look at the following website which provides links to what you're looking for - though in fact this isn't as easy a question as it first looks.