Agree completely !
Please plan on the speed limit points, and take it as a bonus if we manage to de-restrict you.
The same goes for the decent planning notes contained in the STARS for the Scottish TMA (FL260 by Margo/NEW and various others), they are there for a very good reason, the higher ones so that you get below the transatlantic traffic, and the lower ones so that you get below some departure standing agreements between the TMA sectors.
Most of the Scottish TMA controllers lift the speed and level restrictions when it is possible, so please don't hassle us on first call 100 miles from touchdown and ask us a question to which we cannot give an honest answer....once the inbound order becomes a little more apparent we may get you all to fly 280 knots if there are no turboprops around and everyone is reasonably happy !