A novice politician has Thailand's leader scrambling to keep his job. Andrew Buncombe reports.

On the street below, a woman reached up towards Abhisit Vejjajiva and held out a bag of tropical fruit. Thailand's Prime Minister pressed his palms together in a gesture of thanks and respect and reached down to accept the gift.

It was the final day of campaigning before tomorrow's election and as Abhisit made his way through the streets of Bangkok on the upper floor of an open-top truck, he was in no position to turn down an act of kindness from anyone.

The most recent opinion polls suggest he could be 10 points behind his rival and, on a damp, humid day on which the entire city felt like a steam-room, one sensed Abhisit knew he needed to try to reach out to anyone.

Asked about his chances, he said: "You should ask these people. They want to move forward to get stability ... Yes we can [win]."

Abhisit and his Democrat Party are battling against an opponent who is on a roll.

Despite unanswered questions about the Prime Minister's role in the crackdown on political opponents last spring that left more than 90 people dead, they were close to level-pegging with Pheu Thai, the party controlled and financed by former Prime Minister Thaksin Shinawatra, when campaigning started a month ago.

Then Thaksin named his younger sister Yingluck, as the party's prime ministerial candidate.

Contrary to the expectations of many observers, the 44-year-old with no political experience has somehow connected with voters.

Even her opponents acknowledge she has boosted her party's fortunes.

Abhisit, who started his day on his truck then hit the streets by foot to shake hands and pose for photographs with crowds of supporters, said he was not surprised by her performance.

"It's the base of the old Thaksin party," he said, sweat on his brow, as he made his way through a marketplace selling clothes and electrical items.

"When you get a new face, you get a bit of a bounce."

In this hard-fought campaign, it remains unclear whether any party can secure sufficient seats to win a majority in the Parliament.

As such, the winner could be the party best placed to form a coalition.

In 2008, amid a constitutional crisis in which two allies of Thaksin were forced from the Prime Minister's office amid allegations of wrong-doing, it was the influence of the army that helped the Democrat Party obtain sufficient support.

A party spokesman, Buranaj Smutharaks, said: "Our existing coalition has been in place for 2 years. It is possible we will remain there, after the election."

The difference between supporters of the Democrat Party and Pheu Thai is perhaps sometimes overly simplified as the division between a conservative urban middle and upper class, and the urban and rural poor.

But yesterday, as Abhisit, born in Britain and educated at Eton and Oxford, made his way among the market stalls pressing the flesh, it was not hard to find a pattern.

A group of well-dressed women of a certain age, all professionals, could not get enough of the Prime Minister, taking out mobile phones to have their photographs clicked with him.

One of them, Manee, said: "I think he works well. He is a good worker. He has been good so far. Two years ago there was lots of trouble ... . they are doing the best they can under the circumstances."

By contrast, the stall-holders themselves did not appear to be fans.

"I am voting number one," said one man, referring to the Pheu Thai's number on the ballot list.

Abhisit had little time to waste. After the market, he headed back to the Democrat Party headquarters, where candles were burning alongside a shrine to the earth goddess, for a series of interviews.

He then got into his black SUV for a journey across town to the studios of a television network, Channel Three, owned by a family of industrialists, and delivered what was effectively his final interview of the campaign.

Upstairs, one of Thailand's most popular news anchors, Sorayut Suthussanajinda, did his best to press the Prime Minister.

He was asked to evaluate his performance in the last week of campaigning.

"I don't try to evaluate myself," said Abhisit.

"I am looking at talking about the policies we are trying to push."

If he felt tired, he did not show it. After posing for more photographs with a small group of enthusiastic female supporters outside the television office, Abhisit climbed back into his vehicle.

His aides had arranged three more campaign stops for the evening. They knew every moment counts.

- Independent