One of my favourite cycling blogs 'London Cyclist' is shutting down. As a kind gesture to the community, the owner has made their eBook, '35 London Cycling Routes with GPS' free (previously £9.95). Definitely worth a look if you enjoy a leisurely ride through our capital:
https://www.londoncyclist.co.uk/london-cycle-routes-book/
https://www.londoncyclist.co.uk/london-cycle-routes-book/