- Environment Agency http://www.environment-agency.gov.uk/ National Government agency dealing with, amongst other things, water management, flood defence, and pollution issues.
- Equine Ramblers UK http://www.equineramblersuk.co.uk/ A group for people specialising in long distance horse riding. A useful source of advice and contacts for anyone planning to ride the Trail on their horse.
- Equine Tourism http://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"
- Footprints of Sussex http://www.footprintsofsussex.co.uk Offers a range of guided and tailor made walking holiday packages including the South Downs Way. Also offers a luggage movement service.
- Hampshire County Council http://www.hants.gov.uk/countryside/row/info.html Responsible for all aspects of the day to day management and legal matters relating to the Trail in Hampshire
- Hampshire Wildlife Trust http://www.hwt.org.uk County wildlife charity with several open access nature reserves on the Downs
- Hampshire's Countryside http://www.hampshirescountryside.co.uk/ Tourist Information for the Hampshire countryside from Petersfield to Romsey
- Holiday Fellowship http://www.hfholidays.co.uk Offers walking holidays in Sussex and beyond.
- I Know-Hampshire http://www.iknow-hampshire.co.uk/ A Hampshire Accommodation Directory
- Instep Walking Holidays. http://www.instephols.co.uk Offers a range of guided walking holiday packages including the South Downs Way
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