Hi radical_100,
When i came over from Oz i also flew the C206 & BE55, although not flown the types in the UK from my understanding is that the UK have only a SEP (Single Engine Piston) and MEP (Multi Engine Piston) rating which cover all types under 5700kgs. I flew the PA31 & PA34 under the MEP without a type rating on each seperate plane as you would in Australia.
Don't hold me to it but as long as you have SEP & MEP in your license then it's a company check on each type you fly.