Thank you. In order to try and resolve this, the employer should be contacted in writing, advised that this is being treated as unlawful deduction of wages and ask them to pay back the money within 7 days. Advise them that if they fail to pay the money that is owed, legal proceedings could follow.
If the employer does not return the money as requested, the following option is available:
1. Employment Tribunal - the time limit to claim is only 3 months from the date the deductions were made. To make the claim, form ET1 needs to be completed and submitted - you can find it here: https://www.employmenttribunals.service.gov.uk/employment-tribunals
Hopefully by warning the employer you are aware of your rights and are not going to hesitate taking further action they will be prompted to reconsider their position and work towards resolving this.
If they do not and you are still owed the money, then a new feature in the employment tribunal’s claims process is mandatory early conciliation with ACAS. This requires prospective claimants to notify ACAS and provide details of their intended claim and they would then try to negotiate between the claimant and respondent to seek out of court settlement in order to avoid having to take the claim to the tribunal. It is possible for the parties to refuse to engage in these negotiations, or that they are unsuccessful, in which case they would get permission to proceed with making the claim in the tribunal.
If negotiations are initiated and settlement is reached, then the claimant would agree not to proceed with the claim in return for the agreed financial settlement.
The conciliation procedure and the form to fill in can be found here:
In terms of the time limits within which a claim must be presented, the early conciliation process places a ‘stop’ on that and the time between notifying ACAS and them issuing permission to proceed with the claim would not count for the purposes of these time limits.