Earlier quoted context omitted.
Indeed. Border control policies end up being a tit for tat affair. The only reason EU countries have border controls on flights landing in their respective countries from the UK, is because the UK applies border controls on their citizens entering the United Kingdom. I can fly from Germany to Spain without ever showing my passport at my destination, but if I fly to and from the UK I need to show my passport on both s…
If you are from the EU any EU ID is sufficient to enter the uk you do not need a passport.
My point is that you have to present your ID at a British border control. Germany to Spain - nichts, nada, zilch. I just walk straight through.