A Charlie Moone double - including a goal one minute from time - ensured Hampton and Richmond Borough grabbed a 2-1 Ryman Premier League triumph at Billericay Town on Saturday.
The Beavers made light of being down to 10 men for most of the second half after Tom Hickey's sending off to snatch a deserved three points.
Hampton started the brighter and after a Joe Turner shot was sliced wide on 12 minutes, they took the lead in a simple fashion.
Turner cut in from the left, and played a neat pass through the centre, splitting the defence in two as Charlie Moone latched onto the pass and slid the shot under Lumley from about 12 yards.
After Tommy Brewer had to leave the field on 25 minutes following a rough challenge, the Beavers had to re-organise with Turner going to right back and Karle Carder fitting into the midfield.
This lessened the effectiveness of the team and Billericay took advantage of it on 35 minutes through former Beaver Joe Benjamin.
A long pass caused a measure of confusion between the defence and Rodney Chiweshe, leaving Benjamin to take the loose ball and round Chiweshe to pass the ball into the net.
By this time the pitch was cutting up alarmingly and it was a credit to the teams to continue to try and play football. On 55 minutes, the game looked to have turned in the Blues favour as Tom Hickey was dismissed for a tackle that was a little reckless, being one of those that could have been given a yellow on another day.
After this, the team reorganised once again and looked comfortable against a Blues team that looked unthreatening despite having a man advantage.
The Beavers could have easily taken a lead just after the hour as a Thompson header was saved at the near post after a clever James Simmonds free kick into the area.
With 15 minutes to go, the Beavers reorganised a third time with Billy Jeffreys came on in place of Simmonds to play in an unfamiliar right back role, and Aite-Ouakrim slotted into an advanced midfield position, replacing Joe Turner as the team continued to appear the better and more positive.
Inside the last 10 minutes, both teams opened up. On 83 minutes, Charlie Moone picked up a good ball by Aite-Ouakrim and his shot was well saved.
Moone gathered the rebound but the pass ran across the goal with no Beaver within reach.
Just three minutes were left as Bonet-Johnson's powerful volley from the edge of the box for the Blues made Rodney Chiweshe stretch full length to push the ball wide for a corner.
From the corner, Justyn Roberts had to be alert as he got in the way of a goal bound header on the line, with Chiweshe stranded.
The additional time had been indicated when the Beavers generated an opening.
A Lumley goal kick was headed straight back downfield by the Hampton midfield, with the Blues defence caught slightly off-guard, Charlie Moone found a gap and took the ball onto his left foot and shot from a narrow angle.
Lumley had come out but the shot went underneath him and trickled into the net, just inside the far post.
There was still time for Billericay's Glenn Poole to force a flying save from a now injured Chiweshe, but in the end, it wasn't enough to deny the Beavers.
1 Billy Lumley, 2 Chris Webber, 3 George Beaven, 4 Callum Dunne, 5 Richard Halle, 6 Paul Rodgers, 7 David Collis, 8 Glenn Poole, 9 Ricky Sappleton, 10 Sean Bonet-Johnson, 11 Joe Benjamin.
Subs: 12 Ryan Scott, 14 James Robinson, 15 Isaac Layne, 16 Richard Mann, 17 Jeffrey Imudia.
Hampton & Richmond Borough:
1 Rodney Chiweshe, 2 Tommy Brewer (Karle Carder 25'), 3 George Wells, 4 Stuart Lake, 5 Darren Powell, 6 Justyn Roberts, 7 Joe Turner (Belal Aite-Ouakrim 74'), 8 Tom Hickey, 9 Dan Thompson, 10 Charlie Moone, 11 James Simmonds (Billy Jeffreys 75')
Subs: 12 Billy Jeffreys, 14 Karle Carder, 15 Belal Aite-Ouakrim, 16 Kofi Halliday, 17 Luke Wanadio.