Four out of the 12 Disasters Emergency Committee charities have twinned with smaller organisations to carry out work in regions affected by the Boxing Day Asian tsunami.
The twinning scheme was launched after DEC trustees realised the size of the appeal fund and decided to scale up the response to meet the huge needs of the affected populations.
With the appeal raising £300m, the DEC felt it should encourage its members to twin with UK-based aid agencies in areas where teaming up would add strategic value.
Of the £152.3m that has been channelled to the DEC agencies so far this year, a little more than £6m has been passed on to twin organisations.
The scheme has seen Cafod twinned with Islamic Relief; Christian Aid with Habitat for Humanity, Skillshare International, Sightsavers International, Intermediate Technology Development Group and Basic Needs; Oxfam with Muslim Aid; and Save the Children with Plan International.
The member agencies are not currently seeking new twins as the budget for this year has already been allocated. But that could change when next year's budget is announced in the autumn.
Christian Aid's Asia specialist Anjali Kwatra said it took advantage of the DEC twinning opportunity to extend the skills it could use by linking with other organisations.
She said: "They are all very good organisations with particular skills in particular places. They also help us to increase capacity."