(Adds details, quotes) LONDON, April 26 (Reuters) - British Cycling will form an independent review of its performance programmes following allegations of discrimination by rider Jess Varnish, the governing body said on Tuesday. Varnish, a former European champion in the team sprint, was dropped from the British Cycling performance squad after she failed to qualify for the Rio Olympics at this year's world championships in London. The 25-year-old Varnish and Katy Marchant had needed to better France by three places at the worlds to make Rio, a feat they failed to do, prompting Varnish to blame mistakes by British Cycling's coaches. More...