I’m the co-founder (with Brooner) and was race director (2008-13) of the London City Race, one of the world’s largest standalone urban orienteering events, organised by South London Orienteers and taking place annually in September with around 1000 participants. The first event was in 2008 as the City of London Race. After five years in the City, the race was held in Canary Wharf and on the Isle of Dogs, in 2013, on a brand new orienteering map. Since then we have had another “guest area” race in Rotherhithe and continued to extend the main City map in all directions. The 13th edition of the race in 2020 was cancelled due to the COVID-19 outbreak.
The City Race website, which I still administer, is here.