This is a very good SUT for the money. https://hifi-exquis.com/tube-transformer/616-raphaelite-dt11-stereo-mc-pole-permalloy-step-up-transformer-20047k-114-hifi-exquis.html It isn't quite as good as my DIY Lundahl LL1931 SUT but better than the Rothwell MCX.
And I second the recommendation for the Andover Spinstage if your MC cartridge has less then 15-20 ohms of internal impedance. It sounds fantastic. But I don't know if they ship to the UK.