I would use half olive oil and half a blander oil, such as sunflower or safflower, so the flavour of the olive oil is not overpowering.
N.b. remove the egg from the refrigerator (if that's where you store them) 1 hour before making the mayonnaise to bring it to room temperature.
WARNING:prepare for the weather storm all day Friday
Prince William on Graham Norton!
The Government advice re emergency packs


