OS Maps on the site now carries the Ordnance Survey logo and Crown copyright line the licence asks for, and the tile proxy stops a single visitor pulling more tiles than we should in a minute or a day. Cached tiles last a day rather than forever. Importing a route from OS Maps also handles the two-step login page, trims stray spaces on the email and password, and hides the Playwright noise that was drowning the job log.
See also: Planning and following walk routes in the how-to guides, which walks through drawing a route, generating and editing its directions, importing from OS Maps and following a walk on a phone.