Pensioner pressure groups have mounted campaigns in Eastleigh in a bid to capture attention as national media focus on the shock by-election.
The election, to be held on 28 February, was triggered by the resignation of Liberal Democrat MP and former energy secretary Chris Huhne after he admitted perverting the course of justice over a speeding offence in 2003.
The result of the election has been touted as a litmus test of the public's opinion of the coalition's performance so far.
The International Consortium of British Pensioners, which campaigns for the state benefits of expatriate pensioners to be uprated in line with inflation, began a series of protests in 80 marginal constituencies today in Eastleigh.
The ICBP said it will unveil a "hard-hitting billboard campaign attacking broken Liberal Democrat promises on frozen pensions".
ICBP spokesman Brian Legget said: "This is a matter of life and death. With 16,000 pensioners in Eastleigh, we are campaigning for the government to stop cheating pensioners out of their retirement plans."
Over the weekend, Equitable Life policy holders also staged a protest in the constituency, the Southern Daily Echo reports.
About 50 protesters from the Equitable Members Action Group, which campaigns for Equitable policy holders to receive more compensation, staged a demonstration in the town centre.
The group said about 2,500 pensioners in the borough lost between 25% and 60% of their savings when the insurer almost collapsed in 2000. They called on Eastleigh candidates to commit to their demands for Equitable Life victims.
The Treasury outlined its Equitable Life compensation scheme in 2011. It promised to pay out £1.5bn to holders of group pension scheme, with-profits and with-profits annuity policies.
It paid out £70m by February last year. However, EMAG is unsatisfied with the rate at which the Treasury is paying out compensation, and with its refusal to pay compensation to pre-1992 policy holders.
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