At 18:20 on 2 June 2011, a 730 cubic metre storage tank exploded [3] killing four refinery workers and seriously injuring a fifth.

[4] On 1 August 2011 Valero Energy[5] acquired the Pembroke Refinery from Chevron, as well as the marketing and logistics assets, for $730 million, excluding working capital, which was valued at approximately $1 billion.

[7] Valero also purchased ownership interest in four major pipelines and eleven fuel terminals, a 14,000-barrel (2,200 m3)-per-day aviation fuel business, and a network of more than 1,000 Texaco-branded wholesale sites, which is the largest branded dealer network in the United Kingdom and the second-largest in Ireland.

[6] The church is on a very early Christian site and was dedicated to Saint Decuman, whence the settlement's original name Llandegeman or Llandegman.

It was the "bishop-house" of the cantref of Penfro and one of the seven principal churches in Dyfed under medieval Welsh law.