British athletes will be asked to sign an agreement that will ban them from competing for GB if they are found guilty of a serious doping offence.

"If you want to be selected, one of the things you have to do is sign," said UK Athletics boss Ed Warner.

He wants the agreement in place for the 2016 World Indoor Championships, taking place in Portland, Oregon in March.

He told British MPs such an agreement "has never been tested" in court but said UKA was talking to its lawyers.

Warner also called for Russia to be prevented from sending an athletics team to the 2016 Olympics in Rio de Janeiro.

The country was banned from international athletics competition following an independent World Anti-Doping Agency report that alleged widespread doping by Russian athletes.

Warner believes the "state-organised" scandal has been so serious that Russia should not be allowed to send athletes to Brazil.