The National Archives - Documents on Line

Normally free resource sites are reviewed here, but there is such a wealth of information for the UK researcher on the Documents on Line section of the National Archives site (especially comparatively recent stuff), it would be a shame not to bring it to everyones attention - and the cost is very reasonable.

DocumentsOnline allows you access to The National Archives' collection of digitised public records, including both academic and family history sources. Searching the index is free, and costs £3.50 to download an image.

Get an overview of Documents on Line - then move further into the site to see what content is available.

Alternatively, you can just wade in, browse the categories and search.