Do you still pay VAT if the trader is not VAT Registered? I've tried looking it up but still totally confused as usual. Invoice in question is for replacement d/g window but there is no VAT number on the (hand-written) invoice. Received the original quote detailing cost of unit and labour and then I asked is that the total cost, and was told no, VAT is added. Which never fails to annoy me, I need the total cost but that is beside the point. Thanks.