Biba is stepping up its campaign to require insurers to provide cover for tourists caught up in acts of terrorism.
Currently, holidaymakers affected by a terror attack are unlikely to be covered for medical expenses or repatriation. Biba wants the exclusion withdrawn from travel policies.
Technical manager Graeme Trudgill said only a few insurers had acted and removed the exclusion.
"A lot of the big names have still not removed it," he said. "They may say they will make goodwill payments in the event of an attack, but this does not go far enough.
"It is also a concern that travel agents, which are not regulated by the FSA, are unlikely to be telling their customers about the exclusion."