These outbuildings were added in 1868 to an original factory built in 1845.  If I've understood the local information sign correctly, they collected water dribbling down the hill to keep the beer at 12° in the warm summer months.  Beer-making ended in the 1930s, and the property was acquired by Dyant in 1922.
<a href="//commons.wikimedia.org/wiki/User:SashiRolls" title="User:SashiRolls">SashiRolls</a>
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<span class="int-own-work" lang="en">Own work</span>