First up… everything I’m about to say is only my understanding. In your shoes I’d also be calling the numbers to check. I don’t trust me, so you should get a second opinion too 
With that said…
My understanding is that the Scotland TTA - LFA 14(T) - is pretty much the same area as R610A, which is a part of the Highlands Restricted Area.
Where you’ll be is in R610D, which is part of the HRA but not the same as LFA 14(T) (I think!).
NATS specifies that R610A-D are active only via NOTAM, so if there’s no NOTAM they shouldn’t be active.
BUT… I would still be giving the 0800 number a ring, as well as RAF Wittering on the number on the screenshot below.
I’ll also add… be careful if you’re driving east because you aren’t many miles from the Tain Range (D703) which is a different kettle of fish entirely.
I’ll tell you who else I’d be checking with (and hopefully if I’m wrong in anything above he’ll jump in and correct me)… @MrMPW - he knows a thing or six about these things.