The Brummies will face Wolves in the play-off semi-final after securing top place in the Elite League table with a fantastic win over King’s Lynn.
In Heat 14 Josh Auty suffered mechanical failure on the last lap and appeared to pull off the track when opponent Lasse Bjerre fell on the final bend.
Fortunately he recovered to push home, replays showed his rear wheel had just remained on the circuit when he had discarded his machine, meaning his point stood.
Kings Lynn could still have snatched victory with a last-heat 5-1 but Jason Doyle produced a stunning ride to defeat Iversen, with Barker adding the insurance of third place by passing Rory Schlein.
BIRMINGHAM 47: Jason Doyle 13+1, Ben Barker 12+1, Martin Smolinski 7+1, Danny King 6, Josh Auty 5+1, Nico Covatti 3, Chris Harris 1.
KING’S LYNN 43: Niels-Kristian Iversen 12, Nicklas Porsing 10+1, Rory Schlein 9+1, David Bellego 6+2, Mads Korneliussen 5, Lasse Bjerre 1+1, Richie Worrall r/r.