Skipper Dave Wadsley praised the team’s effort and spirit after this London NE3 defeat.
He said: “We are playing some excellent rugby but simply luck is not with us at the moment.
“We must hold our nerve and build on this performance. I am sure that we will recover and finish in mid division.”
Wisbech started slowly and within minutes conceded a controversial penalty try as the heavy Upminster pack took control of a scrum.
Young prop Kerrie McMullen was injured and was replaced by Michael Watts who was forced to leave the pitch after 10 minutes with a head injury and McMullen returned to the battle.
These early setbacks spurred Wisbech on and as a result of good ball retention were rewarded with their first try in three matches when winger Shane Vickers went over.
Shortly after Will Pettit slotted over a penalty.
However the heavy home forwards started to control the game. The home side scored a try as Wisbech missed a number of tackles and by half-time had secured a 28-8 lead.
Wisbech failed to make any in-roads on the deficit. The overall pressure told and Upminster scored two further tries in the half.
Wisbech are at home to Wanstead on Saturday, kick off 2.15pm.