Roof problem on Mini (r53) - garage recommendations in surry

[Rakoosh]

My mini roof is broken - I heard a bit snap whilst trying to close it when it was in 'sunroof' mode whilst on the motorway (yes I know... was trying to call the other half... )

I reckon it should be a relatively quick fix - it looks like part has broken on the left hand side runners so it no longer opens one side (the right hand side is fine) - will likely need a few parts but it will be the labour that is expensive.

Luckily its 'closed' enough to stop rain but I do need to fix it. the car is a r53 jcw convertible..

If I take it to the local bmw / mini garage I understand they will charge up to £100 for 'diagnostics' ...

Does anyone have any tips/recommendations in /around surrey / sw london?

I hardly drive the car (300 odd miles a year) but love having it -other half is not happy if I spend money on it though...