Relatives of Private Lee Ellis are among those seeking compensation from the Ministry of Defence for allegedly not providing adequate equipment or training.
Private Ellis died in February 2006 when his Snatch Land Rover was blown up.
Similar explosions claimed the lives of two other soldiers whose families are making claims.
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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.