Lawyers working for Environment East Gippsland are building a case for an injunction to stop logging at a forest block on the edge of the Errinundra National Park.

Logging protesters held up logging in the block from last Thursday to yesterday when they were removed by search and rescue police.

Environment East Gippsland says the logging is in a national rainforest site of significance and is illegal.

One of the group's lawyers, Vanessa Bleyer, says she is hoping to mount a case in the next 24 hours.

"Really it's only just now that VicForests has gone back in and said, 'well it's a site of significance but we're going to log it anyway'," she said.

"So Environment East Gippsland and its lawyers are having to work hard and fast to stop the irreparable damage that VicForests is causing to a site that is afforded protection by law."

VicForests has released a statement saying that rainforest is not present in the block so no additional protection measures are required.