Thank you all for your replies - i think a polite letter is in order to ask them to define the reason for his dismissal and an explanation of any monies owed and due.

I'm assuming she worked these shift via "the bank" in which case there will be a record somewhere. I would get in touch with the temporary staffing department and provide the evidence you have and explain the shifts worked and the dates and times. I don't believe they have no record. she will have been checked and booked and I suspect it has not been signed off and you are now in another financial accounting period making it a bit if a pain to trawl through

my son got a job in a local call centre about 6 weeks ago At the time he was employed he was asked if he had any criminal convictions and he answered that he didn't (he was currently awaiting trial after he was involved in the most stupid of circumstances and had been advised by the arresting officer and his solicitor to only disclose when convicted, which has now happened) he was doing very well at this job and loving it - in fact he had won a series of company rewards only a week before best overall employee, best in team and most sales and was given a prize of an iPhone 6. He was encouraged to apply for a position of team leader and duly filled out the form answering the do you have any convictions this time with a yes......... This was Friday afternoon. He was pulled into the boardroom without warning, questioned and suspended without pay immediately and informed to return on Tuesday am at 9:30 to find out his fate. He was again taken to the boardroom and was told that they had taken things into consideration and informed him they were prepared to give him a second chance - he was thrilled and most grateful and expressed that he just wanted to wok hard and put everything behind him. At 2pm he was taken into the boardroom and told that they had changed their mind and he was sacked without notice on the spot - no explanation nothing in writing and no chance to appeal or take in a witness. He is devastated and this has been a kick he didn't need - acas have informed him that they think he should with a letter asking why he has been sacked and to give them 7 days to respond. My question is this.... Is this wrongful dismissal and if so can anyone suggest the type of letter he should write? He is aware that he has been very foolish but he is 18 years old - this is a first offences and he has accepted guilt and punishment and is determined to put all of this behind him and get his life back on track and as I said this was a kick he really didn't need. Thank you in advance