Interpretation of Part XIXU.K.
165. In this Part—
“claim” means a claim in accordance with regulations 166 and 167 for a refund of VAT to which a person is entitled by virtue of section 36 of the Act and “claimant” shall be construed accordingly;
“payment” means any payment or part-payment which is made by any person F1... by way of consideration for a supply regardless of whether such payment extinguishes the purchaser’s debt to the claimant or not;
“purchaser” means a person to whom the claimant made a relevant supply;
“refunds for bad debts account” has the meaning given in regulation 168;
“relevant supply” means any taxable supply upon which a claim is based;
“return” means the return which the claimant is required to make in accordance with regulation 25;
“security” means—
in relation to England, Wales and Northern Ireland, any mortgage, charge, lien or other security, and
in relation to Scotland, any security (whether heritable or moveable), any floating charge and any right of lien or preference and right of retention (other than a right of compensation or set-off).