@AtLeastThreeDrinks
Unwritten, implied clauses won’t hold up either...!
Your tax code could be different for any numbers of reasons – your total income (from selling crafts at the weekend, owning property, trust fund, whatever) isn’t your employer’s business.
I think this proves that a lot of full-time office jobs are largely smoke and mirrors – the work can be done much faster than the time allocated. If you’re a quick worker, why should you be penalised? You should be able to work fewer hours for the same salary. But of course we still look at hours worked rather than output. It’s mad, really.
You need to look up your employment law!
*"Most contracts of employment have implied terms attached to them. These include:
The duty to maintain mutual trust and confidence
This duty applies to both the employee and the employer, although it is typically relied on by the employee, particularly in claims of constructive dismissal.
Each party has a duty to conduct himself, herself or itself in such a way to maintain trust and confidence in the relationship of employment. If, for example, an employer acts in such a way to damage the relationship, perhaps by amending the contract and imposing unfair conditions and the employee, then the employee might claim that this trust has been broken.
The duty of fidelity
During employment an employee should be loyal to an employer and not to act against his, her or its interests.
As examples, an employee should not carry on a business in direct competition; or use business assets for personal gain without the permission of the employer.
Since this implied duty only exists during employment, post-employment restrictions should be expressly written down in the employment contract if they are to be binding after the employee has left."*
www.netlawman.co.uk/ia/implied-terms-employment