Well the way i was taught is this.............................
At a roundabout you give way to your right ( not that the police give a sh"t blue's and two's or not)
If you are waiting to go straight on at a mini roundabout but the on coming vehicle is turning into your pathway, they have right of way.
Also alot of drivers at a T junction don't know who has right of way!!!!
When actually if you are going straight on but the car across from you is turning in your pathway, they have right of way.,