Why does the new UK Prime Minister matter for the Middle East situation?

Andy Burnham became UK's Prime Minister just over a week ago. One of his first jobs was to call leaders of Saudi Arabia, UAE, Qatar and Kuwait. He talked about defence, trade, and how to calm down the tension in the region. This shows how a new government often has to deal with a big world problem right from day one — in this case, the Iran war and its effect on the whole Gulf area.