PwC is said by the Burma Campaign to be offering advice through a local accountancy firm to companies setting up in Burma.

The accountancy group does not have a subsidiary in the country but activists believe the work it does encourages links with Burma.

The company said last night that it would “look into these claims” but could make no further comment.

Kuoni is based in Switzerland and has holiday business interests in Britain including Kuoni Travel in Dorking, plus House of Specialists and Voyages Jules Verne in London.

It also controls Alp Air Holdings in Jersey but its main involvement in Burma comes through a Pandaw and Pagodas cruise operation it runs to Rangoon and Mandalay.

The Burma Campaign said it had called on Kuoni to halt its connections with the country but the company denied it had received any such correspondence. “If they do contact us we will listen to what they have to say,” a Kuoni spokeswoman said.

“We have operated there for a number of years but we do not push it or promote it as a destination.”

Mark Farmaner, a spokesman for the Burma Campaign in Britain, said he was confident of bringing Kuoni out of Burma. “So far we have a 100% success rate with our campaigns.”