This has been discussed on the RAC web site, and probably on others. Ludicrously, it seems that for anything but an emergency vehicle to proceed through a red light is absolutely an offence. Either find another route, or hope that the prosecution service will decide not to waste money on the case, or hope that if they do, the court will see things your way instead of theirs.
What I find interesting is the legal position of the chap at the very front who has no urgent business and is patiently waiting for the fault to be fixed. He is preventing the motorists behind him from breaking the law, but so is someone who proceeds at a steady 70 in the fast lane, and such motorists have been convicted in the past of obstructive driving or whatever. Apparently, their submission that they could only have been obstructing lawbreakers cut no ice with the court! So what is the poor guy at the front supposed to do?