Originally Posted by Schultzois

I thought the whole point of the tamper-free bags they seal your purchases in at duty free were to allow connections without having your purchase confiscated. And certainly every time I've bought something at LHR in the last year or so, they've asked me if I'm making a connecting flight after my current flight (before pulling out their tamper-free bag). Is this just curiosity on their part, or are they not going to sell it to me if I have a connecting flight??