LONDON, (Reuters) – If political history is any  guide, Gordon Brown is heading for certain defeat in a British  general election next year.

Economic and political blows are raining down on the Labour  prime minister, eroding his authority by the day and increasing  the similarities with the plight of John Major, leader of the  Conservative government swept away by Labour in 1997.

Credit ratings agency Standard & Poor’s cut its outlook on  Britain to negative yesterday, leading Brown’s Conservative  opponents to renew their attacks on his economic policies just  as the prime minister struggles to contain the damage from a  scandal over politicians’ expenses.

Labour is polling in the low 20s percent, around 16 points  behind the opposition Conservatives who are increasingly  confident they can return to power.

“I don’t think there is any other outcome than a Labour  defeat,” said Neil Carter, politics professor at York  University. “At the moment the only thing open to discussion is  the size of the Conservative majority.”

Comparisons with the situation a year before the end of the   Conservatives’ 18 years in power back up this point of view.

In local elections in May 1996, 12 months before the general  election, Labour polled 43 percent to the Conservatives’ 27 — a  16-point lead but a smaller one than opinion polls were showing.
Major left calling that general election until the last  moment and Brown looks certain to repeat this stance in the hope  of some form of political redemption — May 2010 looks the most  likely election date.

Labour emerged from the May 1997 election with a 179-seat  overall majority after taking 43 percent of the vote to the  Conservatives’ 31 percent.

Steven Fielding, director of the Centre for British Politics  at Nottingham University, sees defeat for Brown at the next  general election as inevitable but says it will be harder for  the Conservatives to achieve an absolute majority.

“The battle now is how big a defeat will it be for Labour  and whether they can prevent the Conservatives getting an  overall majority. That’s still a tall order for the  Conservatives,”  he said.

Fielding said that Brown’s problems were not as fundamental  as Major’s. “His (Major’s) government was fatally divided, in a  way this government is not divided, over Europe,” he said.