These two sides were amongst the pundits` pre-season favourites to go up but they hadn`t reckoned on AFC Sudbury`s tremendous campaign.
On Wednesday night, Harlow hosted a Cray Wanderers` outfit who ended up in fourth place after leading the table for a large chunk of the season.
A bad spell after the turn of the year saw the Wands fall down the table and it didn't get better in front of a crowd of 832 at the Harlow Arena - the Hawks comfortably sailed through their semi-final.
After a goalless opening half, the Hawks hit Cray with two goals in four minutes immediately after the restart, Junior Dadson breaking the deadlock before a penalty was converted by Alex Read.
Jared Small’s cross was finished by Piers Wixon to make it game over just shy of the hour-mark.
Thurrock entered their semi-final against Essex rivals AFC Hornchurch at Ship Lane as firm favourites after finishing as runners-up to Sudbury.
But in front of a crowd of 514, the Urchins produced a solid display to win it after taking an 11th minute lead through a George Purcell spot-kick.
Junior Luke doubled the visitors` advantage in the 38th minute and then defended well after the break to make it through to Sunday`s final.
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