The LAA is very cautious on the subject of aerobatic approvals, largely because whilst the kit manufacturer might suggest the design is fit for +6 -3, there is no guarantee that the construction of an individual kit reaches that absolute value. Some kits are type-approved RV4, some are airframe approved, RV6.

I think the mini-Spit may be aerobatic in some jurisdictions, but needs some concerted effort here for UK approval.

Moggy