Not online , but you can get warning board info by calling :-
0845 988 1188 and when prompted, press 1 immediately followed by the quickdial number :-
011131
Although , checking it now , it was last updated on Tuesday 25th and it is saying that the only red boards out are at Marlow. Not sure what the lag on this service is ...
It really is time the EA got up to date and put this info on an easily accessed webpage. And I mean an easily accessible webpage - something like www.visitthames.co.uk/thamesriverstatus or similar.
£500 for a licence and even the product accessibility info is out of date !!!
-------------------- "Don't tell me why not, tell me how..."