Chris Mottershead’s comments come despite Tunisia’s announcement this month to extend its state of emergency until February 21.
The UK Foreign Office is also continuing to advise against all but essential travel, warning that further terrorist attacks “remain highly likely, including against foreigners”.
Thirty-eight people were killed in July last year – 30 of whom were British – when a gunman opened fire on a beach in Sousse.
Just four months earlier 21 people, mostly European tourists, were killed when three terrorists attacked the Bardo National Museum in the capital of Tunis.