The two other answers to this question are spot on, but I'm going to interpret this question in a different way. I'm going to answer it as if the question said "Who was the first presidential style Prime Minister of UK?"
I would argue that there have been two 'Presidents of the United Kingdom': Margaret Thatcher and Tony Blair.
For the first eight years of her administration, Margaret Thatcher was effectively 'the President of the United Kingdom'. Her administration was able to do things most post war PMs were not able to do, possibly buoyed by the large mandates she was given by the British public in 1979 and 1983.
Given the landslide election of 1997, it became almost impossible for the Conservative party to win the 2001 election, and very unlikely that would would have much of a chance in 2005 (Michael Portillo's words, not just mine). With this sort of a political landscape and public mandate, Blair was able to govern as a de-facto president, allowing him to push through parliament decisions that didn't have, not only, the public's backing but even the backing of much of the Labour party. This can be seen in Blair's decisions regarding Iraq and Afghanistan post 9/11.
Pass a driver infront of you
Answer:
The decision of the Supreme Court on Steagald v United States (1981) established that according to the Fourth Amendment, police officers can´t search for a suspect in a third party´s property without getting a search warrant first.
Explanation:
According to the Supreme Court, the search carried in the house of the petitioner, Gary Keith Steagald, which was conducted only with an arrest warrant for Ricky Lyons, and led to Steagald´s arrest, was a violation of the exclusionary rule stated in the Fourth Amendment that protects all citizens from illegal searches and seizures. I do agree with this decision because any effort to apprehend a suspect should never infringe nor his or a third party´s constitutional rights.
Answer:
Based on the results of the Minneapolis domestic violence experiment, which concluded that arrest was the most effective in most domestic violence cases, the Minneapolis Police Department started requiring police officials to use it as the main approach and to make a report on the reasons not to do it if they fail to do it.
Explanation:
The police policies were changed in March of 1984 and led to a record of people in jail on spouse assault charges.