Straightforward question

Which is the best all round (and reasonably priced) slimline external lightscribe drive at the moment. Budget between £50 - £85.
Many thanks

I’ve only found this one : LG GSA-E50L

The next one that would be a bit better is above the price range you have speciefied. Though there might be others I have not found them.

Sony/Nec “Optiarc” AD-5540A is one heck of a drive for about 75 bucks!