I get it, Tucanos, big, scary, dangerous, but they do not fly on Saturdays, so we can forget them and 99% of the rest of the RAF. If we were to consider them then we stay above 2500 feet, which I do anyway if I can, 3000 - 7000 ft is my preferred band.
A word of warning here.....The company I sometimes work for, and MANY others in the UK often reposition turbo-props and other aircraft VFR at any time of the week and we can quite easily be squashed down below the TMA at 200+ knots same as you, with or without a RIS/RAS. We will of course be transponding Mode S and will always try to get a radar service, but sometimes it just isn't possible......