On to the subject...reading back QNH is like repeating the heading to the next controller--a British oddity.
Indeed, quite an oddity, not generally required elsewhere.
In addition, I have had UK controllers insist that we reduce our indicated airspeed below safe levels...such as 210KIAS.
Normally this speed would be quite OK...however as we were at FL370 and close to MLW in the hold, not especially desirable.
Clearly some of these Brit ATC boys and girls know little about aeroplane performance, which, I suppose, is not that all surprising, as a few of 'em are rather out to lunch, aircraft knowledge wise.