The Pirates have reduced the deficit to nine points at the break. Aaron Penberthy gave them a fourth minute lead with a drop goal.
Rob Cook kicked a penalty, and it was his storming run in the 23rd minute that set up Matt Evans for the only try of the half, which Cook then converted.
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Early showers should clear to leave dry spells overnight.
There could be some thundery showers in the east this evening, but it will soon become dry and clear.
A crowdfunding campaign is well underway to try and save the landmark that stands next to the M5 in Somerset.