We're traveling through LHR this summer and were wondering about the UK ETA travel permit requirement for transiting passengers. No doubt some Tauck travelers have had some experience with the UK ETA since it was rolled out on 8 Jan 2025. We just want to avoid an administrative problem and would certainly get the ETA permit if necessary. Typically, when we transit through LHR, we arrive at one terminal and will need to get to a different terminal for our follow on flight in Europe. In the past we've had to take an airport bus and short subway train when changing terminals for connecting flights. Once at the outbound terminal, we've had to scan in our boarding passes at a kiosk and then are directed to a queue for additional security screening before working our way to the departure gate. We were not asked and didn't show our passports to any UK immigration or border control officer during the 'Connecting Passengers' transit time which lasted only a couple of hours totally within LHR airport. Has anyone experienced a similar transit at Heathrow since the UK ETA program started? Was anyone with a transit like I described asked about having a UK ETA or were asked to show their passport for ETA verification. Clearly understand if we're actually passing through the airport and staying in the UK or even leaving the airport for a night before traveling on that we do need an UK ETA. It's just travelers in the transiting passengers scenario like us who are making a connecting flight and possibly changing terminals to continue on need to have the UK ETA. Thanks for any insight offered.