A disabled child is suing Irwin Mitchell for more than £3m after the firm’s alleged professional negligence saw the 12-year-old miss out on a larger pay-out for his injuries.

The child’s claim, which has been issued in the High Court through his father, argues that had Irwin Mitchell advised him correctly, he would have received around £3m rather than the £650,000 payment he received in damages after he was violently shaken as a baby.