Margaret Haywood was struck off by the Nursing and Midwifery Council
A nurse who was struck off the register last month for secretly filming care for the elderly at a Brighton hospital is to appeal against the decision.
The Royal College of Nursing (RCN) confirmed that Margaret Haywood, 58, would appeal and that papers were being lodged at the High Court.
It said the legal action would seek a judicial review of the decision made by Nursing and Midwifery Council.
Ms Haywood filmed at the Royal Sussex Hospital for a BBC Panorama programme.
The programme was broadcast in July 2005.
Footage from Ms Haywood's filming showed examples of neglect, including an elderly patient sitting in clothes he had soiled the night before.
The Nursing and Midwifery Council found her guilty of misconduct during a fitness to practise hearing last month.
The panel said she "followed the behest of the filmmakers... rather than her obligations as a nurse".
Linda Read, who chaired the panel, said Ms Haywood had prioritised the filming, which in the view of the panel "was a major breach of the code of conduct".
Ms Haywood, from Liverpool, who had been a nurse for more than 20 years, said she thought she had been treated harshly and had put patients first.
She had 28 days to appeal from the date of the NMC's decision.
The RCN declined to comment further while the case was ongoing.