trot,
have a look at the UKAir Pilot stuff on
http://www.ais.org.uk
You can register free and access all the UK airfield info.
A bit of a tortuous route to get to the WU stuff, but try (once logged in):
Publications then
UK AIP then the link to
UK AIP Package .
After that
UK AIP then select (strangely enough)
UK AIP then
Aerodrome Data and then
Aerodromes - Specific - then fill your boots!
It does need you to have Adobe Acrobat reader installed.
It'll be interesting to see you comments on how your original data stacks up against that held in the UKAIP.
Hope that helps
ST