Most large shops and department stores in the UK have VAT Refund forms. But the best thing to do is to ask before making any purchase.

In Norwich, if you are eligible, you can enjoy tax free shopping in House of Fraser, John Lewis, Debenhams, Jarrolds, and etc. To find out if you are eligible, read the Q&A - 'Can I claim VAT back when leaving the UK? How do I get a VAT refund?'