Progreso has two outlets in London

Progreso coffee bars, backed by Oxfam, will stock an espresso blend from the devastated region of Indonesia.

The venture between the charity, farming co-operatives and a trust fund provides stability and fair prices.

Sales exceeded expectations at the first Progreso in Covent Garden leading another outlet opening in west London's Portobello Road on Friday.

Siswandi Idris, a coffee farmer from Takengon, Aceh, said: "Oxfam has helped farmers establish a fair price for coffee which means that we can protect our livelihoods.

Fairtrade was critical to their livelihoods before the tsunami and now it will help rebuild communities Chris Coe, Oxfam's trading director

"I have five children and because of Fairtrade I can afford to send them to school, provide them with medical care when they are sick and plan for my family's future."

Many of the Aceh farmers involved in the project have lost family members and friends as a result of the Boxing Day disaster, estimated to have claimed as many as 220,000 lives.

Chris Coe, Oxfam's trading director, said: "When we first started working with the coffee farmers in Aceh it was to help them work their way out of poverty.

"Now the tsunami has set the region back years.

"Fairtrade was critical to their livelihoods before the tsunami and now it will help rebuild communities."

Coffee farming co-operatives own 25% of the Progresso cafe chain, 25% is owned by a trust set up to benefit coffee growing communities, with Oxfam holding 50%.

The project was launched in response to a 70% fall in coffee prices since 1997, with Aceh farmers one of three suppliers of the chain's espresso blend.