I'm in NW London. Although I'm fine posting them if you're not local and don't mind the cost. Here's a link where I have the wheels up for sale on a thread over on the LFGSS site:
https://www.lfgss.com/conversations/395390/
But something I've just remembered is that the wheels are 7 speed, not 8 like you're after. But it's not a major issue as I actually have a spare one of the XT M732 hubs like in the rear wheel, so can take it's 8 speed freehub and replace the 7 speed one on the wheel, seeing as they're compatible. Will then just need to reposition the axle spacers to correct the fact that there will be a longer freehub body fitted.