This is the tracker device I'll be getting now.
I'll put it in one of our guns and see how it does.
I think the real problem here was that fast transfer and missing it due to delay but I did check with the airline it wouldn't be a problem.
They'll be getting a report as will LHR police & border force because the way that regulations can be swept aside when it suits or have to be adhered to by the letter when it's our neck on the line is astounding. I'll also forward to BASC.