Cycling boosts the UK economy by £2.9bn says LSE

A report into the economic benefits of cycling in the UK has found it's worth £2.9 billion to the economy, with almost a quarter of the population now cycling.
The study, carried out by the London School of Economics (LSE) and commissioned by British Cycling and Sky, attempted to find the 'Gross Cycling Product' (GCP) in the UK. It took into account everything from bike sales to the saving of reduced sick days due to cycling, calculating a GCP of £230 per cyclist.