Deborah Haynes, defence editor for The Times newspaper, has told ITV News that the Afghan soldier suspected of killing two British soldiers had had a 'clean record'.
Speaking from Lashkar Gah, she said he would have had "plenty of opportunities in the past to unload his weapons" on Western troops, and that sources tell her he must have "flipped".
More top news
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.