Unpaid internships should be for no longer than four weeks. The company should provide you with a meaningful training programme designed to help improve both your sector specific and generic employability skills. An experienced member of staff should be nominated to act as your mentor for the duration of your time with the company. Travel expenses should be reimbursed and flexible working hours should be on offer.
Paid internships normally refer to placements of more than four weeks. However, a paid internship also applies if you are required by your employer to work specified hours or undertake specific duties. You can expect to receive a salary equal to or more than the national minimum wage of £6.70 per hour for employees over the age of 21 years.
The CareerHub vacancy database is a good place to start looking for internships, but the suggested links also provide sources of available internships.