£380 fitted, ride in, ride out, then got £30 back from Michelin.
However, the tyre fitter damaged the tyre pressure sensor on the rear wheel, but they agreed it was their fault and will pay BMW to fix it for me.
I tried to get my BMW dealer to fit a rear when booking in for a service and they said they couldn't get any. They said they would fit if I could find and supply one. After searching for a while on the internet and getting nowhere fast, i rang a local bike shop and they have ordered me one, which they hope to have this week, but they said their supplier struggles at times to get them. They quoted me £200 fitted to a removed wheel. So going with that.