For the purpose of this thread, let's assume that Prime Minister Margaret Thatcher (unlike in OTL) is able to fend off an intraparty challenge in 1990, and remain leader of the Conservative Party going into another election (probably either in 1991 or 1992) against Neil Kinnock of the Labour Party, and pledging to her ministers that if she wins another term, it would be her last.
Let's also assume that the economic recovery in the United States occurs earlier than it actually did, enabling the incumbent President George H. W. Bush to be better placed to win a second term in the 1992 elections. With hopes fading of seriously contesting the general election, Democrats instead nominate another liberal -Jerry Brown of California.
What are the butterflies in this scenario? What impact does anyone see in having Thatcher and Bush serving one more term?