Roads allow full access to all attractions in Ashdown Forest, although it is worth getting a map AA or RAC for driving if you are planning to go walking, horse riding or cycling, which is very limited on Ashdown Forest land to the few public bridleways, although there are several groups petitioning for more open access for off road cycling. However is fully allowed on roads; it is worth getting an OS Ordnance Survey map; Royal Tunbridge Wells, East Grinstead, Haywards Heath & Crowborough. Scale 1:25 000 4 cm to 1 km, 2½ inches to 1 mile would be fine, costing usually under £8.00
As for public transport it is fairly limited, buses go from East Grinstead to Uckfield, East Grinstead to Tunbrige wells and beyond. From Uckfield there are regular buses to Tunbridge Wells, via Crowborough. Uckfield, Crowborough, Tunbridge Wells and East Grinstead all have routes to London as do smaller stations, ask at the desk journeys vary from 1hr 20 to 50 minutes.