AFC Sudbury moved to within five points of a play-off place after a 4-1 victory at Burnham Ramblers on Tuesday.
James Baker gave the Suffolk visitors a 13th-minute lead before Steve Spriggs made it 2-0 15 minutes later.
Baker added his second of the game after the break for a commanding lead with Thompson adding a fourth after a 90th minute consolation from Neil Richmond’s penalty.
It was AFC’s fourth victory over the Essex side this season.
The win followed on from AFC’s 6-1 thrashing of Ramblers on their last visit to Leslie Field, in the Robert Dyas Isthmian League Cup third round in November.
They also faced them in the first qualifying round of the FA Cup, where they won 2-1 in Burnham-on-Crouch back in September, as well as beating them 3-0 at the MEL Group Stadium in the reverse of Tuesday’s fixture.
* For a full match report and preview to Saturday’s home game with Brentwood Town, see Thursday’s Suffolk Free Press print edition.