What can we Expect from the MDR Autorised Representative?

Not only has the Medical Device Regulation reinforced the roles, duties and qualifications of the Authorized Representatives, it has additionally established the concept of Person Responsible for Regulatory Compliance for Authorized Representatives similar to the one of manufacturers.  What can we expect from an Authorized Representative 2.0 ? What typical duties and responsibilities does the AR and its PRRC(s) have ? How to manage the relationship between the AR and the manufacturer ?  Can a manufacturer have several ARs ?  What about ARs located in the UK ?