Political punters who bet that #CameronMustGo would trend on Twitter until New Year’s Day lost their lolly yesterday, despite the slogan’s soaring popularity.

Twitter bosses were accused of “censoring” the popular anti-Tory Twitter topic when it disappeared from the social media site’s trends list overnight.

The hashtag has been tweeted over a million times since the online campaign was launched on November 22.

It was mentioned a massive 94,000 times on Monday when it dropped out of the website’s top trends and another 84,000 times yesterday.

Bookies William Hill were forced to consider refunding customers who took a 7/1 punt on the slogan continuing to trend until January 1.

But the bookmakers had had a change of heart by the afternoon when Twitter shed light why #CameronMustGo had disappeared from its trends.

A Twitter spokeswoman refused to make a comment but provided information about how it calculates trends.

It explained that what appears on the list is decided by an “algorithm that identifies topics that are popular now, rather than topics that have been popular for a while or on a daily basis.”

Online experts pointed out that #CameronMustGo falls foul of the same logic that stops US pop star Justin Bieber from topping the trends list forever.

It was also suggested that the campaign has broken Twitter rules that bans users from “repeatedly tweeting the same topic/hashtag without adding value to the conversation in an attempt to get the topic trending.”

Labour MP Tom Watson, who has over 156,537 Twitter followers, called for the campaign to continue.

“There are a very large number of people out there on Twitter who are brave enough to publicly express their view that we need to kick the Tories out,” he said.

“If Twitter have decided that 100,000 people tweeting that #CameronMustGo in a 24-hour period is not worthy of note then people have got to try and game their system.”

Campaigners were last night considering new slogans to be used until the general election.