Sorry - I should have mentioned I'm married to a litigation lawyer. Mind you - I still got a separate employment lawyer from her firm that she recommended to help me negotiate a separation from a previous employer and that worked out really well.
So yes - I'd strongly agree with the overall sentiment that anyone with contractual issues with an employer speak to a employment lawyer. Interestingly enough in some situations UK law requires that the employer pays for the legal advice...
1 how do you as a civillain know which ones aren't enforceable (justicable) 2 can you afford to fight an employers