http://www.rosebikes.co.uk/
Mrs j and I have just bougght a few drivetrain bits from them, inspired by tales of cheaper slx cranks in germany (it’s true, £80 or thereabouts). Despite the .co.uk bit they are German, just very well translated into Englisch.
It would seem they are also waaaaay cheaper than crc/anywhere in uk for a lot (but not nearly the full range) of shimano stuff. Also bought new alivio (ie proper rings and bolt patterns…) square taper chainset and 8sp cassette for the ‘team’ (spare parts for wooing new riding buddies) bike for £18. Yes, for both. Postage is either 6 euros or free if you spend enough (which evidently we did).
That is all.