Hello Dave! Thank you very much for the update. I am scratching my head though because BA is the airline who emailed these warnings to me just last week with my ticket purchase for the UK - Belgium leg of my trip.
I also purposely rerouted my flight home out of Schipol rather than take a chance with the UK. Even within the US, I have had problems with things being thrown away when they are specifically stated as being allowed. When you are at the mercy of TSA agents and trying to make your flight, they have you cornered basically. I really needed to take a single trumpet bag on the UK-Belgium flight as I am returning a Bach C to someone in Belgium, but don't dare chance that I will be forced to put it under. All of this guessing is stressful and I am a bit tired of being held prisoner every time I travel. Even if I call the airline and get their OK for an instrument, the TSA might think differently and they are the ones deciding on the front lines.
