UKH

The Wrekin in Shropshire in the sunset distance 50 miles from Harborough Rocks in October last year.

Wasn’t clear enough to see many of the other Shropshire hills on this day although Caer Caradoc is just visible to the left and the Long Mynd is the ridge to the right.

I’m convinced that you can see The Malvern Hills from Harborough Rocks.

I’ll have to try looking when I next go on a clear day. It’s possible it could be be visible past Cannock Chase

Can you see them from the Roaches (closer, I know)?

Viewfinder Panoramas reckons the Roaches can be seen from Worcestershire Beacon at 75 miles:
http://viewfinderpanoramas.org/panoramas/ENG/MALVERN.gif

The furthest I’ve see so far from Harborough Rocks is the Brown Clee Hill at 59 miles

I've seen the Malverns from Shining Tor, surprisingly clearly, although it was just post Covid so less atmospheric pollution around.