Right an update. I've had the spacers removed, I still wasn't happy with them even after the wheel alignment and as I will potentially do a few trackdays so wanted them off.
The feels much better to drive now they are off, the car feels more alive, particularly the steering which feels more alert and responsive. I won't be putting them on a car again, they really dulled the driving experience for me, caused more tramlining plus concerns about additional stress on wheel bearings mean they are not for me.
I can understand why people put them on, they make the car look great, and my wheels do now look totally lost inside the arches