Last month Gusbourne said sales increased 25 per cent over the first six months of 2023.
Big firms, which also include Chapel Down and Nyetimber, have secured partnerships including with English cricket and Ascot races.
Gusbourne’s head winemaker, Mary Bridges, described the industry as ‘rapidly expanding and dynamic’.
Vintage year: English sparkling wine maker Gusbourne is controlled by former Tory deputy chairman Lord Ashcroft (pictured)
The wine producer is controlled by Lord Ashcroft, the former deputy chairman of the Conservative Party.
It plans to plant a further 135 acres of land over the next two years as demand soars.
Gusbourne has 230 acres of mature vines in Kent and West Sussex and this year forked out £1.7million for extra land next to its Kent vineyard.
Chapel Down boss Andrew Carter said last week that the UK climate is the same as the Champagne region in the late 1980s.
‘It is this bittersweet part of global warming,’ he said.