On the coast to the West of RAF Lossiemouth here so we occasionally have Typhoon's overhead and previously GR4's constantly but not so much these days.
Typhoon's have such a unique sound, you can tell instantly they are overhead by some sort of pre-sound to the usual roar you get from any fast jet, I absolutely love them.
Over the past year there has been two occasions where we have had them pass overhead and got straight onto FR but you can never see the fast jets on that? However, my girlfriends father is as keen as me with all of this, he lives just over the Moray Firth so often gets them on their way to either west coast or Tain bombing range, on these two occasions recent though he has managed to get the A330 (Voyager?) from RAF Brize Norton on the FR for many hours circling the Western Isles/Shetland/Durness tip of Mainland etc as it would be fuelling the Typhoon squadrons from Lossie and Brize. To which it then was on the news sites the next day it was intercepts for Russian movements outwith UK airspace (I am sure all of you in here know about all of those when reported!).
The coolest thing I have seen by far though has to be when I was out training on my bike on a gorgeous morning last year out beside Loch Ness on my way back towards Inverness and there was a Typhoon going down the middle of the loch with nose in the air and arse basically in the loch at super slow speed. I have never seen a jet this low but I cycled along beside watching him for 5 mins, it was amazing. I want that blokes job!
Also at Loch Rannoch/Tummel in the Pitlochry area of Scotland, you often seen GR4's at eye level on the lochs as they practiced bombing concrete bollards at the bottom of Rannoch and then continued down the valley to the dam on the River Tummel. Awesome
Very military focused I know, but I wish could see all the fast jets and other military aircraft on the trackers but of course understand why we cannot.