Powerful shooting by Dusan Crompton and Josh Barrett, who both scored twice, brought Watford up to 10-10 by the end of the third period. Paul Cheetham netted early in the last for Invicta. But goals by Josh Pender, Barrett and Sam Carling took Watford to victory.
Worthing took the step-up to Championship 1 in confident style but couldn't avoid a 7-6 defeat at the hands of Sutton & Cheam. Worthing had led 6-4 in the third period and should have been better placed, having crashed two penalty shots against the Sutton goal frame earlier on.
Goals by Jackson Mullins and Stephen Bayles brought Sutton up to 6-6 at the end of the third quarter. And that was it until 1.10 from the end when Sutton claimed a spectacular winner - Ashley Castle was awarded a free throw well outside the six-metre line and blasted it past the excellent Worthing goalie Marc Guimera - with a back-hander! Later, Mullins scored four as Sutton won for a second time - 18-13 against Watford.
At East Manchester, Caledonia beat Sedgefield 11-10, Jason Dickson firing the winner from a man-up chance 1.44 from the final whistle. Sheffield scored twice near the end through Chris Armstrong and Corran Bradley to secure a 12-10 win over Portobello.
In Championship 2, Nathan Brown netted six for City of Bristol but opponents Cheltenham Spartans scored three times in the last period without reply through Rob Parker (2) and Tom Dally to win 12-9. Brown scored another eight times later on as Bristol beat Southampton 17-9.
It was a mixed day for Manchester Hawks in Championship 2 at East Manchester. They lost 20-11 to Hucknall, for whom Jonny Rimlinger scored six and then needed a penalty shoot-out to edge past Lancaster 12-11 (9-9).