As well as making its own wines, the company works as a contract winemaker for 16 other vineyards.
"Growers have the ground, the tractor expertise on-site and grapes are harvested later than other crops in October," he said.
"But they don't want all the investment. There are a lot of costs in winemaking, and not just the kit. Rather than have all that for one week a year, you might as well get someone else to do it."
Hattingley also helps growers pre-plan vineyards, he added. "They are in the ground for 25-30 years, so it's expensive to correct if you get it wrong."
UK Vineyards Association chairman Paul Langham said 2014 has the makings of a record year but stressed that there could be no certainty until October.
He added: "In the UK, that many growers have a strong commercial background. They understand the need to develop export markets."