Excuse me, like a majority of commercial pilots, I am teetotal
Its obvious that you know the business inside out, good show.
10 miles out going down the glide in a 319 with no headwind, ATC now want 160 to 4 miles, thrust will almost certainly already be at idle. Speedbrakes for a few seconds or gear, your call. I would say that 50% of the 319 approaches I make into LHR require the use of speedbrake to promptly comply with ATC speed requests. You don't have the faintest idea what you are talking about.