Google Vat 126. You should have a XHV type of number.as a unique identifier for your Parish Council You can enter the information online and then print it off and post it. It is very Easy. The information required is Just Date of transaction , Suppliers VAT number , WHo is on the invoice ie Acme Parish Council , Simple summary of goods ie It Equipment and the Value of the Vat to be reclaimed. Then you have to total your claim and send it off.
I find the easiest thing to do is every month go through your invoice and build you claim - ready to submit either 1/4 or annually depending on the volume.