The poster who replies to me on page 1 then confused restrictive covenants preventing someone working for a competitor on leaving your job fir a limited time 8eriod with a clause in your current contract preventing you from taking on other paid work.
That poster also indicated that nothing you do outwith your working time can affect your employment, which is obviously untrue.
I did not confuse restrictive covenants. You assumed that was what I was talking about but I wasn't.
An employee, in common law, cannot be precludes by their employer from taking on other work. However, the employer does usually say in the employment contract that employees may not take other jobs, but this is a breach of your human rights. The employer does have rights too, one of which is to protect their business and therefore they can prevent you taking a second job with a competitor (or dismiss you if they found you have breached this clause).
So if you were an investment banker at JP Morgan (ignoring FCA rules which are additional) then they could take action if you had a second role at Chase. But they would not win a case if your second role was at Tesco. It a side hustle selling macrame on Etsy.
And if you reread my post, I did not say nothing you do outside your working time can affect your employment. Also, I replied in the context of this thread.
I'm surprised you have such a "professional" role when your comprehension is so poor.
I'll ignore the bit about dodgy income where people don't pay tax as that has been covered. But suffice to say, I do short term work and usually in a regulated industry and both myself and my Ltd company are background checked every time and there's no way I'd get a job if there was a hint of impropriety.