Princess Anne’s husband gained a black eye from a “gardening incident”, Buckingham Palace sources have said. Sir Timothy Laurence, who celebrated his 69th birthday last week, attended the Royal National Lifeboat Institution’s 200th anniversary earlier today. Royal fans noticed that Sir Timothy had a black eye at the charity event at Westminster Abbey on Monday. Princess Anne’s husband got the injury in a gardening incident involving some fencing at the weekend, Palace sources told The Telegraph. Sir Timothy continued to attend the service marking the 200th anniversary of the Royal National Lif…