Stuart Easton says losing his place in the Showdown by just three points to Dan Linfoot was 'especially harsh' after being unable to defend his top six spot due to injury.

The PBM Kawasaki rider, who made a remarkable comeback from a broken left leg and right ankle suffered at Brands Hatch in July, appeared to be in promising form during Friday practice but his race weekend came to an end after crashing during qualifying.

The Scot suffered further damage to his injured left leg and was ruled out of racing in the triple-header at Oulton Park.

As a result, Easton was powerless to watch his top six spot slip away as Honda Racing's Linfoot and Tyco BMW's Michael Laverty secured enough points to displace him down to seventh in the BSB championship standings.

"After all the hard work in getting back for this round, it's not only disappointing to suffer another injury setback, but to miss out on a Showdown place by a narrow margin is especially harsh," Easton said. "I gave it my best shot and it didn't work out so now I have to concentrate on getting fully fit again."

Easton, who hopes to return to action in two weeks time at Assen, now enters the fight for the BSB Riders' Cup which he currently leads by 20 points ahead of Buildbase BMW's Richard Cooper.

PBM team owner Paul Bird was sympathetic to his rider after seeing how hard he had to fight just to return to racing before his crushing qualifying crash and is confident he'll be able to return stronger.

"It's been a bittersweet weekend and obviously I'm really disappointed for Stuart after fighting his way back from injury only to suffer another one this weekend," Bird said. "He was riding really well this season and the broken leg in July came at the worst possible time and it's ultimately cost him his place in the Showdown. He's a fighter though and will come back stronger for sure."