Links

Airfields
WWII Airfields
Twinbases - RAF Bentwaters and Woodbridge
Airfield & Aviation Memorials
Airfield Information Exchange
Debach Airfield Museum One of the EACS Endurance venues.

Calendars
Ian Hardy's stage rally calendar
racedates.net
Fairfield Motorsport

Maps
Latest OS map editions
Where is the Path? - a great dual OS and Google map view.
grough Route - could be interesting if it goes free in April.
Large OS GB display with GPX import
Map coordinate convertor, and links to MANY map sites for a given location.
ACME Mapper - full page Google maps.
Flash Earth - multiple map/aerial sources
GPS route planner
Open Street Map
Open Street Map viewer
GPX to Adobe Illustrator conversion service
Above and Beyond sell OS maps.
Centre Maps sell OS maps.

Weather
Net Weather
MetCheck
XC Weather - wind forecasts
Live Storm Data

Car/Parts advertising
Motorsport Sales
Rally Cars For Sale
Rally Used Parts classifieds
Close Ratio
Race Cars Direct
Raced and Rallied
Rallying UK
Race Cars for Sale
Rally 24

Tyres
Tyre safety
UK tyre law
Carbibles.com: tyre bible

Towing
National Trailer & Towing Association
Also.
HSS Hire guide to using a trailer

Modification/preparation
Gear Ratio Calculator
Spring Rate Converter
Coil Spring Rate Calculator
Spotlight Wiring.
Automotive Converters and Calculators

Free Computer Software
The Open Disc - a collection of good open source software - includes the programs below.
Scribus - Desk Top Publisher
Inkscape - Vector graphics drawing package
Dia - another vector graphics drawing package
Open Office - full office package, including word processor, spreadsheet, database, drawing, presentation.
PDF Creator