There has been an article in MCN recently saying that it is even illegal to push a motorcycle across, (not along, but across) a pavement if it does not have road side drop kerbs, drop kerbs constitute a right of passage for a motor vehicle, as in someone driveway.
I am assuming that Motor Cycle News know what they are on about.
Pavements are for pedestrians, Bus lanes are for buses, if you go on to either of them you could be prosecuted, no matter what the circumstances,
Just as Red Light means stop, being bullied or coerced into crossing the white line at a red stop light by a emergency vehicle is no excuse in law, you are responsible for your actions, cross a red light and be caught on camera or seen by a heartless officer you will be prosecuted.
The Highway Code states that a red light means stop.
So I guess you should not proceed until a green light is showing, proceed on a red at your peril, there are people who have that right of way travelling at 90 degrees to you, take one of them out and someone loses their life it is death by dangerous driving.
My understanding is if an ambulance, Fire Engine, Police car takes out a car by crossing on a red he will be prosecuted also. The law does allow an emergency vehicle to cross red light, but the rule is proceed with caution, take a car out then there was no caution and therefore it's dangerous driving.