New here, spent an afternoon reading around for opinions on high quality media. Mitsuis seem well regarded, but equally UK suppliers are somewhat lacking.
Anyway, remembered a shop on Tottenham Court Road, and sure enough they have them:
According to the search tool, they haven't been mentioned before. Thought your might be interested.
p.s. and why you're there you can buy 5000ft of Quantegy for that 2" reel-to-reel you've got kicking around.