Originally Posted by
flolee
Oh, since when has it changed? A year ago it would have been taken from you (well, me, in this case
). At SFO they told explicitly that the sealed bag is not going to be accepted at LHR.
Many U.S. airports' duty free shops have offered tamper-evident duty-free bags for a while now. I am not sure if they are pro-actively asking shoppers whether they need one but you can always ask.