The British Rowing Indoor Championships (BRIC) is an indoor rowing event previously organised by The Rowing Company under the title British Indoor Rowing Championships (BIRC). It first began in 1991 with the first event held in Henley-on-Thames attracting 200 competitors. Over the years it outgrew all of its venues and from 2000 was held at the National Indoor Arena in Birmingham. The 2005 championships had over 3,000 entrants and is currently the world 's biggest indoor rowing event and Britain's biggest mass-participation indoor sporting event. Olympic rowing gold medalists Steve Redgrave and Matthew Pinsent have won open titles at the event in the past.