You can't have them serve at the same time- it's ASB. In foreign policy Powell was a nationalist/conspiracy nut. A diehard Unionist who would use a full-throated military solution in Ulster. Very anti-American and a conspiracy nut- he believed that the CIA assassinated Mountbatten among other things. He would treat Northern Ireland as an integral part of the UK- no different than any of the others. Economically speaking he founded the neoliberal wing of the Conservative Party in the 1950s and 1960s- long before anyone had heard of Thatcher. US-UK relations would go into a deep freeze- much worse than Heath, Major or Obama.