Steph Twell was not happy with Saturday's 1500m race at Crystal Palace after slow pace-making almost cost her her place in the squad for next month's World Championships in Berlin.

The St Mary's University student faded badly in the home straight having led from the 800m mark and could only finish sixth behind British rivals Lisa Dobriskey and Hannah England.

With Charlene Thomas already guaranteed one of the three spots on the plane for Berlin, it looked like Twell could miss out, but her second-place in the trials two weeks ago earned her the call up over England.

She justified that decision on Tuesday night in Monaco when she beat England and ran a personal best of four minutes 3.48 seconds, but it was the tactics employed on Saturday that angered her.

"I was bitterly disappointed with the pace-making to be honest," said the 19-year-old.

"To go into the race being told by various people the pace is going to be two minutes six seconds at 800m for then to go through in two minutes 17 seconds is just ridiculously off the mark and I question the nature of that race.

"I think everyone was looking out for each other but I didn't want to play that game, I wanted to think about myself and my own race so I took the bull by the horns and took it on.

"I went with the intent to win and I always do but unfortunately I didn't hold it together.

"I think the other girls had more ability to work together whereas I became the target."

Twell is now looking towards next month's Championships and expects the races there to be very different to Crystal Palace.

"I think hopefully Berlin will be different races," she said.

"I always make sure I go in with a purpose in a race and make it my own so I can finish with the satisfaction that I have done the best in my ability rather than having it controlled by others."