The trade body is on a recruiting drive at the London Wine Fair and said it is particularly targeting independent wine merchants and English wine producers as it seeks to represent a greater chunk of the industry.
Chief executive Miles Beale said: “There is a need for a strong and informed industry voice and an authoritative one. Through the duty cuts and changes to glass recycling rates we have achieved in the past 18 months, we believe the WSTA has saved the industry £350 million.”
He added: “We are looking to extend our membership base, looking for more independent retailers and English wine producers.
“There have been rumours that the WSTA doesn’t act for smaller companies. We have an enormous number of start-up companies that join the WSTA.
“There’s a simple solution for non-members that claim we don’t represent them: join. If you join we can talk to you and represent your interests. I want to make us representative of a more informed industry of diverse interests. We need a stronger voice in Brussels, London, Edinburgh, Belfast and Cardiff.
“We need a strong voice in the media, where the arguments of the public health lobby play out. Help us to be a stronger voice for the industry, so we can become more influential.”