A real, paid job where you also train towards a recognised qualification. In England at least 20% of your normal working hours are spent training, and you don't pay tuition fees.
The document showing what you were paid and what was taken off. Check it against your contract and the minimum wage.
Definitions are our own plain-English summaries. Where we give figures, they come from the official sources listed on
the linked guide or profile. Rules can change, so check the official source before you make decisions.