It`s neck and neck at the top of the Bostik League Premier table following wins for both Billericay Town and Dulwich Hamlet on Boxing Day, leaving the Blues on top on goal difference.
They found Thurrock a tough nut to crack in the Essex derby at New Lodge in front of a crowd of 1,653.
But a 33rd league goal of the season for top scorer Jake Robinson after 57 minutes eventually saw Billericay home.
Three first half goals saw Dulwich to a comfortable derby win at third-bottom Tooting & Mitcham United and maintained their unbeaten league record at Imperial Fields.
Nathan Green after 8 minutes, Reise Allassani 10 minutes later and Nyren Clunis 4 minutes before the break had Hamlet in command.
Sam Flegg`s 75th minute effort `won` the second half for the Terrors, but it proved too little too late.
Hendon slipped above Staines Town into third after they comfortably won 4-0 at Earlsmead against Harrow Borough, while the Swans were being held to a 0-0 draw at ninth-placed Wingate & Finchley.
An own goal 7 minutes before half-time from Chinua Cole gave Hendon a lead that Dave Diedhiou doubled 3 minutes into the second period.
Josh Walker added a third just past the hour-mark and a Niko Muir penalty rounded things off for the Greens 7 minutes from time.
Folkestone Invicta are back up to fifth after they triumphed 3-1 at the Fullicks Stadium in the Kent derby against Tonbridge Angels.
Dan Thompson gave Angels an 11th minute lead they held until just shy of the hour-mark when Scott Heard equalised.
Adam Yusuff then restored the home side`s lead on 65 minutes and Ian Draycott added a third less than 2 minutes later.
Invicta overtook Leiston, who were beaten 1-0 at home by neighbours Lowestoft Town.
An unfortunate Seb Dunbar own goal after just 7 minutes eventually settled the Suffolk derby in the Trawlerboys` favour.
Margate missed the chance to put pressure on the top five after they were beaten 4-2 at lower mid-table Dorking Wanderers.
The hosts couldn`t have wished for a better start as James McShane put them in front inside the opening minute.
But it wasn`t until the 56th minute that Isaac Philpott added a second that Frannie Collin almost immediately cancelled out.
But Philpott made it 3-1 in the 78th minute and a penalty converted by sub Lewis Taylor took them 4-1 ahead, rendering Collin`s second, also from the spot in stoppage time, as just a consolation.
At the other end of the table, bottom side Worthing moved to within a point of second-bottom neighbours Burgess Hill Town after a 2-0 success at The Bibby Financial Services Stadium.
Alfie Young after 23 minutes and a second from Kieron Pamment just before half-time settled the game in the Rebels` favour.
Needham Market pulled themselves five points clear of the drop zone after a best-of-five win at the Taydal Stadium against Brightlingsea Regent.
The Marketmen raced into a 2-0 lead inside 17 minutes through Luke Ingram and John Sands.
Aaron Condon reduced the arrears on 28 minutes, but a third goal from Gareth Head just before the hour-mark settled the points in the visitors` favour.
The Marketmen moved above Harlow Town in the table after they were beaten 2-0 at home by Enfield Town.
Liam Hope put the visitors ahead after 28 minutes.
But the points weren`t sealed until 7 minutes from the end when veteran defender Darren Purse converted a penalty.