Two brilliant goals from Rob Parker - heavily marked in the centre-forward position - helped Cheltenham secure a 9-7 lead after two quarters. Turning point of the game came in the next period when Cheltenham, leading 10-9, had two men excluded. Lancaster couldn't take advantage - goalkeeper Sam Legge made a great last-ditch save - and Cheltenham promptly counter-attacked to score a fine lobbed goal by David Taylor and a long-distance effort by Jake Vincent.
That wasn't the end of Lancaster, who provided nerve-racking moments for Cheltenham supporters as the score levelled at 13-13.
A draw would have made Cheltenham champions by a point. But they made sure of victory when Adam Legge converted a man-up chance just over a minute from the end. The trophy and medals were presented by BWPL life member Dr Mike Clark.
Cheltenham line-up, back row, left to right: Will Rayson, Max Gerasimov, Joel Thomas, Ben Matthews, Mike Thomas, Sam Legge. Front: Mark Banwell, Will Middleton, Matt Jenner, Guive Shafie, Jerry Birmingham (assistant coach), Jake Vincent, David Taylor, Adam Legge, James Ross (coach), Rob Parker.