Kilgore, this also shows how easy it is to think "I'm IFR I most be separated from other traffic". This is wrong because it depends on the type of airspace you are in as well as the type of service you are offered.
eg in class G airspace (the FIR) an IFR ac receiving a RAS must be separated from a VFR ac which is known traffic, but in class D (a control zone like at Stansted or Birmingham the same ac do not have to be separated except the IFR ac is given Traffic info and only given standard separation if requested ( I think and await other people to correct me if I am wrong).
See it's simple really.......................