Here is another helpful resources when doing geneological research.
http://www.genuki.org.uk/big/Britain.html.

To add to my previous post, post-1855 are more helpful than you might think. As all deaths were registered after this date, it is possible to find information on people born in the late 18th Century. You can find marriages for people born in the 1830's. As places of birth, etc. are included, you can piece alot of things together.