As an ex-resident of the UK, I can safely say that duty free shops are not as good a deal for tourists as for British natives at the London airports anyway. Britons are saving 17 1/2 percent in VAT. Tourists can claim this back - as long as you are not a resident of a European Union member state.
Does anyone have any opinions on the suspension of duty-free for travellers travelling within the EU? This could mean the closure of some duty free shops at airports - especially Heathrow Terminals 1 and 2 which are primarily used for European flights ...