Time Out says
Friendly warning! We're working hard to be accurate. But these are unusual times, so please check that venues remain open.
This is a 12-mile walk that takes you along the River Pinn from Pinner to the Grand Union Canal at Cowley, through green spaces, conservation areas and wildlife havens. The walk can be done in either direction and is named after the Lesser Celandine flower that can be found in the woods along the way.