The National Archives is based in Kew in the London Borough of Richmond upon Thames in south-west London.
A separate National Register of Archives for Scotland is maintained at the National Archives of Scotland, but its contents are duplicated within the NRA at Kew.
ARCHON Directory is a database of contact details for archive repositories in the UK and institutions elsewhere in the world which have substantial collections of manuscripts relating to British history.
Researchers are encouraged to check the online services first, to see if they can get what they want online.
If a document is available online, The National Archives' policy is to encourage people to use the digital copy and not the original, even if they come to Kew, in order to protect the original from damage.
The National Archives also provides services to help users in their research and also find collections beyond those it holds.