If your guitar is on the ice-picky side, pure nickels might cure that without changing pots and pickups. because, as mentioned above they have a warmer, mellower tonality. hey, that's the vintage sound in my book.
the surface feel is much smoother. they are a bit more stiff and you may not bend a string as far as other makes
I find nickel plated strings tend to start off with a bright, overtone rich rattle & buzz, which quickly wears off after a couple of hours playtime. then its constantly downhill when they start dying.
not so the Pure Nickels. they're more consistent in tone from the start 'til end of life.
they never seem to break, IMHO.
they last much longer than anything else.
since you're in the UK, check out Thomann's Pyramid strings for a bargain price.
our US brethrens who like these strings have to dig much deeper in the wallet to get them.
https://www.thomann.de/gb/pyramid_egitarre_saiten.htm