Hi there, many thanks for your patience. The issue here is that if he has been continuously employed at his place of work for less than 2 years then his employment rights will unfortunately be somewhat limited. Most importantly, he will not be protected against unfair dismissal. This means that his employer can dismiss him for more or less any reason, and without following a fair procedure, as long as their decision is not based on discriminatory grounds (i.e. because of gender, race, religion, age, a disability, sexual orientation, etc.) or because he was trying to assert any of his statutory rights (e.g. requesting paternity leave, etc.). So it is entirely possible for the employer to dismiss him without any warnings or even evidence of poor performance.
If the dismissal had nothing to do with any of the above exceptions then he would not be able to challenge it and his only protection would be if he was not paid his contractual notice period, because unless he was dismissed for gross misconduct, he would be entitled to receive his contractual notice period. If he did not have a written contract in place he would be entitled to the minimum statutory notice period of 1 week. His employer would either have to allow him to work that notice period and pay him as normal, or they will have to pay him in lieu of notice.
If he was not paid his notice period when he was due one, that would amount to wrongful dismissal (which is different to unfair dismissal) and he could make a claim in an employment tribunal to recover the pay for the notice period that he should have been given. There is a 3-month time limit from the date of dismissal to submit the claim.
This is your basic legal position. I have more detailed advice for you in terms of the steps you need to follow should you have to pursue for unpaid notice period, which I wish to discuss so please take a second to leave a positive rating for the service so far (by selecting 3, 4 or 5 stars) and I can continue with that and answer any further questions you may have. Don’t worry, there I no extra cost and leaving a rating will not close the question and we can continue this discussion. Thank you