For some Twitter users, his reappearance has been somewhat unwelcome.
Tony Blair is like a Prime Minister we once had and now all hate him. Yeah, that's it.— Bozwonk (@lolwarlol) July 21, 2015
Dear Tony Blair. Why are you still here? Please go away. Sincerely, everyone.— Amy (@AmyxJean) July 22, 2015
Why does Tony Blair keep appearing in my trend list? JUST GO AWAY!— Alison B (@Alibear1980) July 22, 2015
But for others it's been a long time coming.
Bring Back Tony Blair. Your party needs you.— Craig P Sheppard (@PCGuru07) July 22, 2015
Whether you love him or hate him, Blair's term as PM saw some impressive achievements. We've remembered a few here...