The three goal advantage soon became four just two minutes into the second-half as Munt’s corner was met by Blencowe and he headed into the top corner from close range.
A further two minutes later and Ferriera netted his fourth of the game and put Sussex five goals to the good as he capitalised on some lackadaisical defending from Kian Nash-Hill, to steal the ball on the edge of the area and fire powerfully past Chaudhry into the net.
Ferriera almost claimed his fifth goal of the afternoon on the hour mark after Tom Chalmers played him in but this time London keeper Chaudhry came out on top as he made the save one-on-one.
With quarter-of-an-hour left to play another Sussex corner brought about a sixth goal as McSwiney rose highest to meet Tegan Freeman’s deep delivery and head in from a yard out.
McSwiney had another opportunity moments later from another Freeman corner but this time he could only direct his header just wide of the post with Chaudhry scrambling across his goal.
Five minutes from the end Sussex added a seventh goal. Freeman was again involved this time sending a curling cross in from the left that Marchant did well to get across his marker and make contact with ahead of the goalkeeper to send it goal-wards and just over the line.
Sussex didn’t let up in the final knockings and Chaudhry had to be alert to first deny Ferriera with an outstretched foot when through one-on-one, then Blencowe his second of the game with a sprawling save from close range at the back post.
After the match Sussex manager Gary Mansell was delighted with his side’s performance and said: “We didn’t know what to expect from London, but we went out there and showed our opposition respect and put in a really committed and professional performance.
“The fear at half-time coming in 3-0 to the good was that we might take our foot off the gas, so we spoke to the boys about going out there and making sure we get the next goal and stay on top, which we did, and in the end got a resounding result!”
(A selection of photographs can be found on Facebook - courtesy of Simon Roe Photography)
Goals: 7-0; Shots: 14-4; Shots-on-target: 9-3; Corners: 7-3; Fouls: 6-13; Offside: 1-0; Yellow cards: 0-0; Red cards: 0-0.
Sussex: Lockyer, Chapman, Ward, Marchant, Blencowe (C), Cuthbert, Ferriera, Munt, Ramsis, Chalmers, Popham.
Subs: Freeman, McSwiney, Little, Wright.
London: Chaudhry, Gomes, Rock, Abolorinwa, Nash-Hill, Erhabo (C), Gordon, Doyle, Belazregue, Amir, Bux.
Subs: Garcia, Rios-Berrio, Opoku, Green, Clarke.
Match report by Darren Ford.