I own a caravan on a Parkdean site. The site fees are about £2500 plus VAT. The company has just written to us asking for £2800 odd inclusive of VAT but the amount they say is net, plus their VAT doesn't work out at 17.5 %. I am guessing that some items that they are charging for are zero rated. The thing is, it is on a letter, not an invoice, they haven't quoted their VAT number, there is no invoice number and no breakdown on what each item that they are charging for comes to with what rate of VAT. I asked for a VAT invoice back in September which hasn't been provided, so I contacted them again today to ask for a VAT invoice. I am supposed to pay this bill by the end of December. Am I within my rights to refuse to pay until I am provided with a proper VAT invoice? Or due to the fact that I signed a contract saying that I agree to pay the service charge every year mean I have no right to request a VAT invoice? I thought it was illegal to write to someone asking for x plus VAT unless they give you a VAT number and breakdown of net plus VAT.