David Taylor-Smith and Ian Horseman Sewell, who quit their roles at G4S on Friday, are not expected to receive any pay-offs outside of notice entitlements within their contracts.
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The Duke and Duchess of Cambridge met young people who have battled mental health issues on Saturday.
Former Chancellor Lord Geoffrey Howe was Margaret Thatcher's longest-serving Cabinet minister, also taking on the role of Foreign Secretary.
Lord Geoffrey Howe is known by many for his resignation speech which was seen as the catalyst which destroyed Margaret Thatcher.