The recovery was led by left-hander Nicholas Corjon, whose three goals levelled the score at 12-12 midway through the final quarter. Otter goalie Alex Davies made three vital saves as Rotherham rallied, but the London side edged ahead with 2.39 to go when skipper Orion Ganase converted a man-up chance. The final Otter goal was added just four seconds from the end.
Manchester Hawks stole a 13-12 victory against Cheltenham Spartans, hitting back from 4-1 down in the first quarter to lead 8-5 after two, mainly thanks to a four-goal spurt from Tom Roche. Cheltenham were briefly level at 10-10 in the final quarter, but Hawks then broke clear again with goals by Sam Fitzsimons (2) and Luke Roche.
Earlier, John Pratt scored eleven as Sedgefield walloped Croydon 28-12. Worthing beat Castleford 11-6, controlling much of the game after building a 4-1 lead in the first period. Left-hander George Wood scored four.