Oxford and Cambridge are once again set to do battle.

The Blue Boats will be out for glory along a four-mile stretch of the River Thames from Putney to Mortlake later.

Cambridge’s Light Blues have won seven years in a row in the women’s race and six of the last eight men’s races.

However, E.coli has been traced in multiple water samples in recent days.

Last year, the winning team was warned to avoid the tradition of throwing the cox in the water because of very high levels.

Five-time Olympic gold medal-winning rower Sir Steve Redgrave has also voiced his concerns in recent days.