If you are planning to go to the HRR qualifiers, please note that there is no parking for spectators on the regatta’s land, as it is too wet. See the red box on the website’s home page for confirmation:
https://www.hrr.co.uk/index.php
UPDATE: @HenleyRegatta on Twitter is saying that there will be spectator parking off Wargrave Road (use postcode RG9 2LT). It’s probably worth checking before you make final plans as things seem to be changing quickly.