Its a London thing
Seems London has plateaued at around 9 – 10% on the Citymapper Mobility index.
Yesterday

Last week

A week ago we were at 10%
https://petestilgoe.com/2020/03/31/still-a-way-to-go
Some of it will be related to the UK allowing daily exercise but 2.5 / 3 times seems alot.