class d airspace : ifr under radar control service, vfr under approach control -
class e airspace : ifr under radar control service, vfr can operate WITHOUT reference to atc if they want to. therefore radar need to take avoiding action with the ifr's against these unknown contacts, but vfr can get a service from atc if they want one
confused? - you will be!!
as far as i know within the uk class e is only in the scottish tma.
prof