smcaul:
Go in and remind him that as you have not had to do weekends for the last 7 years that has become your normal working practice and any change to that is seen as a change to your contract - I can’t remember the exact terminology but is basically an implied contract and has become the usual and accepted, therefore any change would be detrimental and a claim for constructive dismissal or unfair dismissal could be brought against them.
It’s called accepted custom and practice.
Try these links
http://www.yourpeoplemanager.com/YUq-b3xoTX_-WA.html
http://www.yourpeoplemanager.com/YX4zNRY.html
This part is interesting:
It is unsafe to simply notify employees that the contract will be varied without their agreement, particularly if the changes lack immediate impact such as a change to pension rights or sickness benefits.
The only safe option is to dismiss all employees who refuse to consent (on proper notice) and immediately offer to re-hire them on the new terms. This is, obviously, hugely damaging to staff morale and employers should think carefully before embarking down this route.
Plainly, any employee who does not wish to accept the changes will have a claim for unfair dismissal (subject to establishing one year’s continuity of employment). Indeed, there is no reason why an employee should not be able to accept the new job but claim unfair dismissal in respect of the old one, from which they have been dismissed.
If, however, the employer can demonstrate a ‘good, sound business reason’ for the change, it is likely to be able to establish some other substantial reason for dismissal. If a proper procedure has been gone through, including consultation and inviting voluntary agreement, the dismissal is likely to be fair.
However, if the changes do not have any negative financial impact on the employees, tribunals will usually be willing to accept that dismissal for refusal to agree is fair.
At tribunal the following factors will influence whether the dismissal is deemed fair or unfair:
Even if the dismissals are found to be unfair, the employee may well be found to have failed to mitigate their losses if they refused the job offer on the new terms. The tribunal will, however, normally award the basic award in full. Knowing this, employers and employees sometimes agree cash sweeteners calculated by reference to the basic award formula in exchange for accepting changes in terms of employment.