No doubt someone with more encyclopaedic knowledge will appear but my understanding is yes but...
a. not IFR if it's in class D (can't remember if EDI is) - you must be VFR
b. if you are VFR you must carry an observer in the other seat (doesn't have to be a pilot - the infamous 'granny' rule i.e. it could be your granny. They have to shout if they see any aircraft conflicting!)
You can fly it IFR outside CAS (as in the UK you don't require an IR to fly IFR), or VFR in or out of CAS but with an observer.
Tim