I am broadly relaxed about anyone how people chose to interpret everyday speeding laws, as they are clearly a means of income generation, and as long as they don't whinge and whine when they are caught and accept the penalty that's fine. That doesn't mean I take the same view about all motoring offences
Some laws are less enforced than speeding - and I am relaxed about adherence to them as well, again as long as people don't moan when caught. But some laws have far more severe penalties, which is also presumably a reflection of how important the state thinks they are, and the seriousness of potential outcome for perpetrator and victim, and so I am not as relaxed about them being broken.
As we know, cyclists routinely ignore red lights, for which there is no penalty that can be enforced as there is no way of identifying a cyclist using a camera. They'll come of worse, so I don't mind if they break them
Lots of people speed. The penalty for that for most offences is 3 points and £100. in 2021 there were 2.4 million speeding offences, of which 3/4s were dealt with by speed awareness courses - at £100 a go that's £2.4 billion of income... So break speed limits within reason as often as you like. I struggle to get worked up, and I certainly won't be 'policing' it myself...and if anyone loses their licence as a result, well, you had enough warning
Plenty of people use mobiles when driving, but they do tend to whine when caught. The penalty for that is up to 6 points and £200. Again, I can't get worked up about it - hopefully they will lose their licence before too long anyway and cameras are increasingly being deployed to catch offenders
There are 42 million cars in the UK, of which ~ 300,000 are on the road and uninsured at any point in time. So the % is small - but the penalty is unlimited, the car can be seized and destroyed and the driver disqualified. I have no idea if a car is insured, but hopefully between ANPR and the police this is being tackled.
As 45% of people do speed on the motorway, I think it's safe to assume that there is tacit acceptance by the government and the police that the main reason that limits are what they are is for income generation, and therefore those who are rigidly sticking to 69 mph are not playing the game by the rules that are in place, and are in fact denying critical services like schools and the NHS of income ;)