Sounds like a pretty substantial car free zone is coming to central London:
https://www.theguardian.com/uk-news/2020/may/15/large-areas-of-london-to-be-made-car-free-as-lockdown-eased
and no mention of pop-up-cycle-lanes.
Taking Social Distancing Seriously
Re: Taking Social Distancing Seriously
Yes, looks like a great bit of segregation.