Wayne,
You take one Mini Cooper S and take it to Birds in uxbridge. They are they distributors/resellers of all things Hartge (known for BMW tuning) and Carlsson (known for Mercedes tuning). Birds then perform the Hartge Mini upgrade where ECU maps are changed and pulleys on Superchargers are changed/modified. Volia one 210-215Bhp
MCS.
I have been meaning to speak to them re: Insurance.