We spent a few hours up here at the Spade on Wed 19th.
At around 1120, Brew 21 (F-15) called up for activity at FL50 - FL240, thought we would be thwarted by the cloud cover to get a visual, but thankfully he requested lower level, and were treated to some nice jinking manoeuvres (with vapour ribbons and wonderful jet noise) at about 1500ft before he climbed up again for some more high level runs calling for 'Game On'.
Then went quiet for a few hours, before 3 * Merlins (Vortex callsign?) requested permission to fly though the southern end of the range.
They were in a very loose line astern formation heading north towards us, then turned 180 degrees about 1 mile South of Wiley Sike.
Then as johnhowe said Typhoon 27 requested the range from FL50-FL350, the first few runs were at very high level, and we only just got a brief visual when the cloud cleared for us.
Once he had gone, we packed up for the day.
The F15 was a real high-light, never managed to catch one up here before.
Although there is never a guarantee of any activity on any given day, its probably best to go on a day with minimal cloud cover if possible, as a lot of the ops are at medium to high level these days.