£89mil?
A house I guess is the first starting block, id look for something around Radlett and Aldenham as it is where I live now.
Car wise:
Aston Martin DBS (Grey)
Audi S5 (Black) For the family of course
Corvette ZR1 (Blue)
Lotus Exige (For track use)
350z (modded) (Black and twin turbo so I can come on meets)
Lamborghini Gallardo Spider (Orange)
Ferrari F430 coupe scuderia (Ferrari Red with silver stripes)
Id buy a few properties in the City and rent them out, along with some disused warehouses and develop them into luxury apartments.
The rest, I would invest and put away into savings, thus living off the interest.