We start at Taplow on the Elizabeth line and follow stretches of the natural Thames and man-made Jubilee River to reach Dorney Court for lunch. We continue to Boveney to rejoin the Thames into Eton, from where we cross into Windsor with its shops, restaurants, cafés and pubs. Note that the Jubilee River normally prevents flooding in this area, but the walk may be modified or cancelled if there are flood alerts.
Train: Elizabeth line from Liverpool Street (10:06), Paddington (10:18), arrive Taplow 10:53. Return from Windsor & Eton Central to Slough (and Elizabeth line) or Windsor and Eton Riverside (to Waterloo). Freedom Pass holders returning via Slough need only a single from Windsor and Eton Central to Slough. Contactless is cheaper than a prepaid ticket with Railcard discount, but you must touch out at Slough and re-enter with your Freedom Pass.
Lunch: café and toilets at Dorney Court. Note that there are no dedicated picnic facilities.
Toilet: at Taplow station, Dorney Court lunch break, in both Windsor & Eton stations and Slough station.