While 75% of the firm's 500ml bottles are sold in 15 overseas markets, Murphy believes it will become a global brand faster as part of a big drinks group with more resources and a wider distribution network.
To date, the Suffolk brewery has relied on tours of its 13th-century manor house and London pub for word-of-mouth marketing.
Murphy used the proceeds from the sale of Interbrand to Omnicom in 1993 to set up St Peter's Brewery, which has annual sales of £2m.
One to watch, page 25.