Employment Lawyers Can Answer Your Employment Law Questions
To commence this you would need to enter into conciliation with ACAS, using the following link: https://tell.acas.org.uk/
This is a free and impartial service whereby ACAS will try to resolve the matter between yourselves and the employer. This will often involve settling payment for wages owed. If this fails they will issue a certificate allowing you to bring a claim to the employment tribunal.
Glad to be off assistance, we wish you all the best going forwards.