There is growing anger in Malawi over a post-Christmas fortnight trip to the UK that one of the country's vice-presidents is due to take.

Jane Ansah's visit will be in a private capacity, but the reported size of both her entourage and the overall cost of the trip has ignited fierce criticism. The details have been disputed by her office.

The row began after the circulation of an alleged leaked letter to the Malawi High Commission in London, signed by Secretary for Foreign Affairs Chauncy Simwaka, listing 15 individuals set to accompany Ansah.

In power since October, the vice-president's government has pledged to manage the economy competently and has already announced a raft of austerity measures.

Malawian media have published further alleged details about the visit, reportedly from leaked documents saying it would cost hundreds of thousands of dollars.

While the vice-president's office has confirmed the trip, it has disputed the information in circulation about how much the state is spending.

"These documents did not originate from any government institution and do not reflect official records or approved government expenditures," the vice-president's press secretary Richard Mveriwa said in a statement.

"The Office of the Vice President remains committed to transparency, accountability, and the responsible use of public resources, and strongly condemns the deliberate spread of false information intended to mislead the public."

The spokesperson did not, however, say anything about the number of people making the trip, said to include two accountants, four security personnel, three assistants to the vice-president, and other officials.

A Malawian human rights organisation, the Human Rights Defenders Coalition (HRDC) said it finds the reported size of the delegation "deeply troubling, particularly given that the trip is explicitly described as private yet appears to be financed using public resources".

Ansah was the running mate to President Peter Mutharika, who soundly beat incumbent Lazarus Chakwera in September's election.

They promised a "return to proven leadership" that would manage the economy better than the Chakwera administration.

Among the announced cutbacks in government spending are a reduction of both domestic and international travel by senior government officials.

When he was sworn in, Mutharika promised to be prudent. He said his government would not be a "feast" for members of the administration and supporters.

The HRDC said the vice president's UK trip, due to start on 26 December, directly contradicted the government's own rhetoric on austerity and called it a "double standard".

"While Malawians are continuously urged to tighten their belts, endure hardship and accept reduced public services in the name of fiscal discipline, senior political leaders appear to exempt themselves from these very principles," the organisation said.