Tax free shopping when flying out of Heathrow
I'm not sure if this is the right place to ask this question, thought the BA forum is where most of the regular Heathrow flyers are able to provide a quick answer. If not, Mod please move to somewhere else.
A relative of mine is flying from Heathrow. She used to hold a non EU passport but a few years ago married a UK citizen and earlier this year was naturalized as a UK citizen as well. Can she now, holding a UK passport, still purchase tax free goods from the stores at Heathrow T3 and T5 when flying to a non EU destination?