This morning's commute and other commuting stories

If RP is Richmond Park, I believe they do have speed limits which apply to cyclists, don't all royal parks have a cyclist speed limit ?

It's not clear as the law was amended several times and the definitions of 'vehicle' were mixed up:
https://road.cc/content/news/95155-are-police-fining-speeding-cyclists-richmond-park-exceeding-their-authority

Before anyone starts the "but cyclists aren't required to have a speedometer so how can they be prosecuted for speeding" consider drink driving laws, there's no requirement for cars to have blood/breath alcohol meters fitted, but you've still got to keep under a defined limit. Most cyclists who will be pushing 30mph+ know they are doing so (and probably have a GPS to tell them how fast they are going).

The cyclists the Police will generally go after (if they do go after them, it depends on the coppers in question) are the ones pushing hard down Sawyer's Hill or Broomfield Hill, especially if they're overtaking cars on the way down. They tend to ignore people freewheeling and not overtaking the cars that are also going their way.