- Discovery Travel, Cycling & Walking Holidays http://www.discoverytravel.co.uk/ Discovery Travel organises a wide range of self-guided walking (and cycling) holidays with good quality accommodation and luggage transfers in Britain and Europe including on many of the National Trails.
- East of England Region http://www.eastofenglandtouristboard.com/
- English Heritage http://www.english-heritage.org.uk/
- Enjoy England http://www.visitengland.com/
- Equine Tourism http://www.equinetourism.co.uk/ Equinetourism.co.uk - Putting people in touch with the experts and professionals they need, for the good of the horse, horse welfare and good horsemanship - at home and abroad
- Explore Britain http://www.xplorebritain.com/ Self guided walking holidays on several National Trails and cycling on the South Downs Way.
- Factivities http://www.factivities.co.uk/ An online directory which makes it easy to find outdoor activities, outdoor activity centres, outdoor pursuits and adventure activities in the UK.
- Footpath holidays http://www.footpath-holidays.com/paths_and_trails/index.html Footpath Holidays has been providing quality walking holidays for twenty five years and take clients along a number of National Trails each year; South west coast path, Pennine Way, Cotswold Way, Thames Path, Hadrians Wall Path, Offas Dyke, Pembrokeshire Coast Path.
- Footscape http://www.footscape.co.uk/ An exclusive choice of guided and self-guided holidays in Dorset
- GPS Cycle Routes http://www.gps-routes.co.uk This free site has cycle routes for most English counties. Each route contains gps files, elevation profiles and maps with a photographic aerial view of the route. Some of the routes follow National Trails for part of their duration.