Capita's share price plummeted 54% since the attack
The news comes despite a security breach in March which exposed pension data
Private business competition makes recruitment 'a tough, tough play'
Incident expected to cost Capita up to £20 million - before the fine
Executives first said hack was 'Just a small breach'
News follows statement by USS last week that 470,000 members could have been affected
USS, the UK's largest pension fund, relies on Capita's technology to facilitate its internal pension administration procedures
The company says it has implemented measures to safeguard the integrity, safety and security of its IT infrastructure
No evidence of any data being compromised, says Capita, although cause of the outage remains unclear
'Strategic suppliers' earned £19 billion from the UK public sector in the 12 months to September 2021.