Watford lost 19-17 to Thamesians in their final game of the season.
On what was a warm summers day, Watford's mood was soon dampened as following a slow start, Thamesians deservedly opened the scoring with a well-worked try.
Going behind appeared to ignite Watford, as they hit back, with the pack in particular disrupting the opposition's set piece.
As a result, the backs were able to make several half breaks. Eventually their pressure paid off and a close-range penalty conversion from Kiely brought the visitors within two points.
However, following a spell of weak tackles from Watford, Thamesians soon hit back with a conversion of their own. At half time, Watford were trailling by nine points.
Realising the need to increase the intensity, Watford started the second half a different side, enjoying a sunstantial period of possession. Bernarius, finding himself unmarked on the wing, dodged his way round the covering Thamesians defence to score Watford's first try of the game.
Kiely failed to convert, however Watford continued their waves of attack upon the restart and returning flanker Reeves put the Stags ahead for the first time in the game, with Keily's conversion making the score 17-12.
With ten minutes to go, Thamesians regained their form, and they capitalised on the width to score their second try of the game. The Thamesian kicker then kept his head as he converted to score the final points of the game.
Despite finishing on equal points with Hatfield, their superior points difference enabled them to take third place in what, outside of the top two teams, had been a closely contested league.
Despite his team's loss, skipper Rick Flint was proud of his team.
He said: "We came here desperate to take four points and secure third. Unfortunately, we came up just short against a well drilled Thamesians team.
"However, there is no shame in finishing fourth and with a good pre-season there is no reason we cannot push for top spot in this league next season."
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here