I cant answer your question but I would consider action against the company he worked for before Christmas.
They are clearly in breach of the national minimum wage requirements and I imagine several health and safety laws given his age and what you say about the company. �1.30 is not even the training wage of �80pw which could be argued as he didnt have a structured training programme. You can either make a claim or just a complaint at this website:
http://www.hmrc.gov.uk/nmw/complaint.htm
Good luck to him in September, and to you in getting some financial support.