So, the things I looked for, which lead me to a mid-late 80s frames were as follows:
A gear hanger for a bolt on derailleur, not a hang-on-the-axle type. Yours has the little lobe, I can see it in your second photo.
A bsa threaded bottom bracket, not an Italian or French, for ease of choosing a hollowtech II bottom bracket. A Raleigh will certainly have that too.
Those recessed brake holes, for modern brakes. Not the end of the world as you could just choose a longer threaded modern brake and secure it with a nut if the frame/fork doesn't have the recess for the Allen key but.
An axle spacing no smaller than 125mm. Some people will say you shouldn't ever bend/stretch a frame to fit a modern 130mm spaced wheel in, but I've not found it to be a problem at all. I wouldn't stretch a 120mm frame to 130mm or a 125mm to a 135mm hybrid wheel, but 5mm extra has been fine without needing to 'cold set' the frame. I just flexed the stays by hand to fit the modern wheel to put the 10spd cassette on.
Gear cable bosses. My Carlton had the lever bosses on the frame, which I just attached cable stops to in order to use my STI shifters. If yours doesn't have them, you'll probably want to get an old band on pair of down tube shifters, take them apart, and fit the cable stops to those, unless a pair of band on cable stops exist as a problem solver product. It'll be crucial that the band on part is secured tight as it'll throw the indexing out if it slips at all.
I think your frame would take these modern components just fine.