Chevron you are correct, it is not very clear on the charts but checking it out I see it is class D, but in this case MAN ATC are not providing the correct service!
Class D. IFR and VFR flights are permitted and all flights are provided with air traffic control service, IFR flights are separated from other IFR flights and receive traffic information in respect of VFR flights, VFR flights receive traffic information in respect of all other flights.
I cannot find anything though that says aeros is actually illegal in CAS.