OVER 200 health workers in the Unison and Amicus unions at Sunderland Royal Infirmary staged an unofficial walkout on Thursday of last week. They were protesting against changes to their pay under the government's Agenda for Change scheme-the biggest ever shake-up of pay and conditions in the NHS. Sunderland hospital is an "early implementer" site being used as a test-run for the government's plan. A week before the walkout, management started to send out letters to inform staff of their new pay bands.