In view of the shameful lack of consideration given to the well being of cyclists in this country, my advice would be: do whatever you need to do in order to stay safe and healthy on the roads, obedience to traffic laws should be a secondary consideration.
Traffic laws are there to CREATE safety. Flouting them diminishes safety.
I've never understood the argument that sometimes you have to jump red lights to stay safe, like somehow people believe that if they slow down and stop appropriately some oik behind is going to run into the back of them. If you really believe that people are going to do that to you so often, how do you sum up the courage to even take to the road at all?
If you can safely get through a heavily polluted area without stopping for the traffic signals that's your prerogative, similarly, if you feel the need to take to the pavement to avoid a particularly shitty section, that's also your prerogative.
Are you saying that POLLUTION is a reason for jumping red lights? You do realise that us, as cyclists, breath in much less pollution than car drivers and passengers with their lower position and fans and AC sucking it all in off the ground, right?
What possible justification is there for taking to the pavement? If you find a particular stretch of road too hairy, change your route, write to your MP and council, choose an alternative method of transport or man up.
If and when the authorities actually *do something* to sort out the air pollution and reduce the threats caused by lorries/speeding cars, obedience to the traffic laws might become a higher priority.
Again, how is the issue of pollution a justification for RLJing? And do you really think if there were greater policing of antisocial driving that would stop selfish cyclists from jumping the lights?
The only justification for RLJing is when traffic lights are faulty. Anything else is just a poor justification for selfishness. If you want to get somewhere faster, get fitter - or just leave earlier.