Jumping Temporary Lights

[Supernova190188]

This morning I was at a set of temporary 3 way traffic lights, sat there at the front for 6 mins with them on red, both the others must have turned to green as cars were going through but then for probably 2-3 mins nobody was moving at all as they were all on red, the cars opposite came through, then I drove through with everyone else following behind.
I assume that this is technically illegally as you're jumping a red light but obviously cant sit there all day on red, so is this an offence or not? Although if so the police officer would have to be a right tosser to actually do you for it.