I've just checked their site ukwda.org and it's offline. Their Facebook and Twitter pages don't show any posts after 2014/2015 respectively.
We were one of the first agencies to join the UKWDA after they launched in 2001. To be honest I can't say there was any real support given other than it being a relevant listing service.
You would think that given the size of the web design and development industry in the UK that there would be a decent industry body to support and help provide some guidance. I'd be interested to hear other peoples thoughts on this. Maybe something does exist.