By holding the patient's head completely still, radiographers can target tumours more precisely.

BBC: Radiotherapy mask

Paramedics, occupational therapists, radiographers, physiotherapists, healthcare assistants, administrative and support staff have joined picket lines at the Royal Shrewsbury Hospital and Telford's Princess Royal Hospital.

BBC: Public sector strikes 'biggest ever' in Shropshire

It covers professionals such as nurses, midwives, radiographers, paramedics and pharmacists.

BBC: Healthcare training backed by ?82m from Welsh Government