Cyclists are being encouraged to record and share incidents of bad driving in a bid to improve road safety.
The scheme, launched by cycling organisation CTC, aims to reduce incidences of inattentive, arrogant or aggressive driving.
CTC hopes that information it gathers through the Stop SMIDSY campaign will help it lobby for improvements to the way that police, prosecutors and the law encourage safety on the roads.
Publicising the organisation's efforts in a Guardian blog post, campaigns director Debra Rolfe explained that the campaign is named after 'sorry mate I didn't see you' - a phrase "most regular cyclists have heard at some point".
Rolphe said that cycling is "actually relatively safe" - the Royal Society for the Prevention of Accidents says that road accidents killed 136 cyclists in 2007, seriously injuring 2,428 - but that there is still a lot of work to be done to discourage bad driving.
"CTC has heard many stories over the years about police or prosecutors failing to act in ways that adequately protect cyclists," she said.
"By creating a database of these stories, we will form a picture of what is actually happening to cyclists on our roads, and what needs to change."
However, while the campaign's focus is on cycling - offering legal help and tips to bikers involved in accidents -other road users are also encouraged to log their experiences.
