Editing M25 motorway (section)

===Racing===
The motorway has attracted unofficial, and illegal, [[Auto racing|motor racing]]. At the end of the 1980s, before the advent of automated speed enforcement devices, owners of [[supercars]] would meet at night at service stations such as [[South Mimms services|South Mimms]] and conduct time trials.{{sfn|Moran|2009|p=163}} Times below 1 hour were achieved – an average speed of over 117&nbsp;mph (188&nbsp;km/h), which included coming to a halt at the [[Dartford Tunnel]] road user charge payment booths.<ref>{{Cite web| last = May | first = James| author-link = James May | title = Speed, Greed And The M25| publisher = [[BBC Radio 4]] | date = 20 October 2007| url = http://www.bbc.co.uk/radio4/factual/pip/ap895/?focuswin}}
</ref><ref>{{cite press release | title = Programme Information – Network Radio Week 43 | publisher = [[BBC]] Press Office |url=http://www.bbc.co.uk/pressoffice/proginfo/radio/wk43/sat.shtml}}</ref> The winner received champagne rather than money. The ''Enfield Gazette'' referred to an "M25 club", and posters appeared near the M25 advertising the "First London Cannonball Run".{{sfn|Moran|2009|p=163}} The racing had mostly disappeared by the end of the 1980s after speed cameras were introduced.{{sfn|Moran|2009|p=164}}