In a statement, Blair said: "Jack's contribution to law and order in Britain and this country's standing in the world is quite simply formidable.
"In 2015, Parliament will lose one of the most able politicians of my generation, but I have no doubt that he will be immensely successful in whatever he turns his hand to next."
More top news
Southern England will start dry and bright, and sunnier, colder weather will arrive in the north later in the day.
Drivers caught speeding excessively can now expect fines starting from 150% of their weekly income.
Freshman Ethan Roser, 19, was hit in the head by a hammer while working at a track and field competition at Wheaton College in Illinois.