In your opinion,who is the worst prime minister in British history.?

Without a doubt,that accolade goes to Tony Blair.Until he became pm,life was a joy.The minute he became pm,things started to rapidly go downhill,and the country still hasn't been able to recover from the damage he did.

Probably Chamberlain, RIP.

Well, we've had some real corkers in the 300 years of the role existing. I'll give a choice of five.

Spencer Perceval (1809 -1812)

His three years as PM were distinguished by political infighting, weak government and riots on the streets. Britain was in the midst of the Napoleonic wars and the industrial revolution and Perceval’s government was characterised by draconian measures taken against hungry rioters and oppressed workers. Not a good time and to cap it all Spencer Perceval was shot dead by an angry member of the public right in the Houses of Parliament, the only PM to ever have been assassinated.

Arthur Balfour (1902-1905)

Balfour came to office in charge of a confident Conservative party which had just overseen a military victory over the Boers in South Africa, but by the time he left in 1905 it was a disunited party that had just been trounced in the general election. In just three short years Balfour had managed to lose control of his own party, which was riven by dissent over free trade, effectively sacking colleagues right, left and centre – even forcing Winston Churchill to abandon the Conservatives for the Liberals. Balfour was even beaten in his own seat at the general election in 1905, making him the first British Prime Minister to suffer that particular humiliation. He continued to wreak havoc post PM duties when, in 1917, he announced the "Balfour Declaration", supporting the creation of a Jewish homeland that laid the foundation for the Israeli-Palestinian conflict still continuing today.

James Callaghan (1976 - 1979)

The epitome of "bungling" and "useless" and totally at the mercy of the toxic, radical trade unions that had spread through his Labour Party. During his tenure as PM the UK became known as "the sick old man of Europe", with strikes hitting almost every job sector, a terrible economic policy and water, electricity and gas supplies being cut off in major cities resulting in "the Winter of Discontent" and martial law being considered. Callaghan became notorious for blurting out the immortal line, "Crisis? What crisis?" after returning from a holiday in the West Indies as Britain shivered in the freezing cold with no no energy to heat homes and was collapsing to it's knees.

Gordon Brown (2007 - 2010)

After spending his whole political life trying to become PM, when he got there he didn’t seem to know what to do with it. A man way over his head as both Chancellor and then PM, he seemed to attract disaster wherever he went. Although he dealt well with the financial crisis of 2008, he had an inability to connect with the general public with his dour, Scottish Calvinism giving the impression he was 400 years out of his time. He even managed to successfully alienate supporters when he was caught on a hot microphone calling one of them a "bigot". Despite being a relatively intelligent Labour Party man, he ended up being an empty suit.

David Cameron (2010 - 2016)

From one liability to another. Although the first part of his premiership saw public finances getting back to an even footing, how someone only suited to "middle-management" became PM is a mystery. His tenure shall be forever defined by one catastrophic decision – to offer and then deliver an “In/Out” EU referendum, just because he was terrified of losing voters to far-right UKIP. Assuming it would never pass, this wet blanket and ineffectual excuse of a PM decided to down tools and walk away from his job when the results showed the exact opposite. Not for him the clearing up of the mess he had decided to create, ironically to save his own job.

In recent history -- Gordon Brown, undoubtedly  

And incidentally , he was the worst chancellor too .

A man ,who like Trump , was promoted well above his abilities and just wouldn't accept that .