Just to follow up on this..
I visited Center Gravity yesterday for my geometry set-up, unfortunately the tyres I ordered didn't arrive until today so I didn't manage to get those fitted, and now I'm going to have to make another trip up to collect!.. But in a way it was good, as I could really see how much difference the geometry set up made to the handling on the current tyres.
And what a difference it is !! Its made the car feel planted, much more nimble, and really confidence inspiring. It's transformed the car for the better, and I am amazed at the change in the handling just from having it set up properly by someone who clearly really knows what they are doing.
I was there from 8.30 til about 1.30, and could have easily stayed all day, it was more like a day out with some lessons on suspension geometry and hanging out with other car guys than it was a visit to a garage. They explain everything in detail so you understand what it is they are doing and why.. and the results speak for themselves when you go on the test drive with them afterwards. It may seem pricey but it really is 100% worth it and I'd seriously recommend it if you can get over to them.
Here's some pics I took, including one of the car that was being set up on the other ramp that I thought was rather nice!