Ayr rage....
Being on the receiving end of the TMA feed up north, it seems to me that "No speed restriction" is a standard on first call at Scottish. To be honest, I'm not sure that any of the traffic we get is ever subject to SLP's, or for that matter the descent restrictions, or maybe some of the scrapes we get into, especially on 06, may be avoided.
Just a point about the turbo-props, most of them end up going faster than the jets at the levels we deal with, and bringing jets in before the props can often end up making more work below FL100. Jets being handed over at 300kts or greater doesn't help any of us when the first call to us is "reducing to 250kts" and there's a turbo-prop going faster just behind.