HD/WHBM,
As far as I know, it is still SOP in that airline not to arrive more than 20 minutes early. I think now though it's virtually unseen by TC as judicious adjustment of cruising speed now achieves the result.
Let's hope the well motivated staff don't have to slow things down at all when that new Tower is eventually opened.
Let's hope the well motivated staff are given a decent flight data display system that is not loaded with so many bugs that both the Heathrow ATC Technical Committee and SRG express surprise and concern.
Oh no, too late.