<s>[INST] Who was the British prime minister in the year 2000 [/INST] The prime minister (PM) of the United Kingdom in 2000 was The Rt Hon Tony Blair. He was the longest serving Labour PM, acting from 1997 until 2007.</s>\ <s>[INST] Who was the British prime minister in 1345? [/INST] According to historical records there wasn't a British prime minister in 1345. Britain would not see its first prime minister till 1721.</s>