Hendon's survival hopes go into the final week following the weekend defeat at Westfield.
A spirited comeback from 3-0 down was briefly on the cards as Dave Diedhiou and Sam Shaban both scored excellent headers, but a stoppage time strike from Caleb Wright secured the runners-up spot for the home team.
Goals from Bill Montague, Imran Kayani, and former Green Kyen Nicholas had given the hosts what looked like an unassailable lead, and with Littlehampton's game against Hayes being abandoned at half time following a mass brawl, Hendon have a nervous midweek wait to see if survival is confirmed before the final game on Saturday.