Length: Main Walk 16.5 km (10.2 miles). Toughness 4/10. Shorter options are available, starting or finishing at Cowden, which is the stop after Hever on the same train.
10:07 Uckfield train from London Bridge (East Croydon 10:22), arriving Hever at 10:49
Return trains from Ashurst to London are at xx:56. Buy a return to Ashurst (or Cowden if you are finishing there).
There are some nice bluebell woods in this quiet part of the High Weald. After two hours of walking through remote hills and wooded valleys you'll come to the Fountain in Cowden, an attractive Harvey's village pub popular with walking and cycling groups. It's got a conservatory and a large back garden, but call ahead if you want to be sure of a table inside. For a picnic, the church is probably the best spot - it's to your left as you reach Cowden, before you turn right towards the pub.
The lunch and tea places are not far apart but you can extend the afternoon section with an extra two miles along a river valley if you wish. Your reward is a tearoom at the Perryhill Orchard Farm Shop, which also sells a tempting range of local ciders (which you can taste beforehand). Note that it's a fairly hilly 4 km onwards to Ashurst station and at least an hour so time your departure carefully or bring a book to read while you wait for its hourly trains.
You'll need to print the directions from the L=swc.175 page.