HMRC view has moved on considerably since 2014 and a purchase through a parish council solely for the purpose of avoiding VAT is considered fraudulent. However, often the devil is in the detail of course. If your minutes reflect the purchase is solely to avoid the parishioner paying the VAT element, it's fraud. If the records reflect the purchase of a bench for the benefit of the public and, separately, a donation received (which the council is empowered to receive), then I'd suggest it would be difficult to suggest VAT avoidance.