My rule for getting out of the way off blues and twos is do what is necessary to make them room unless that act in itself unreasonably endangers another road user. What anyone thinks of that choice who is NOT the driver of said emergency vehicle is of no consequence at all. I would chance 3 points for an ambulance to make a space to possibly save a life. £60 and a small insurance hike for a human life. It's a decent compromise.
Thankfully I have never been put to the test on the latter point because I have normally managed to create the space long before the vehicle has got to me because I use my mirrors and ears. Of course if more people used their mirrors properly these drivers jobs would be easier. Drivers on the m27 this morning being a prime example of not moving over until the ambulance was slowing down even though the traffic flow allowed them heaps of space to get over before that.