As the question was not answered I would like to revive this old thread.
I have spent sometime today going through insurance policies in an attempt to get cover for my laptop & camera and found nothing suitable - hence ending up here looking for answers.
Its easy enough to get a quote of baggage value to £2500 which would more than adequately cover everything I travel with but single items are usually limited to £250.
I have come across this issue before and just taken the risk but if I spending out on insurance it would be nice to have some peace of mind. Surely there must be plenty of people who do not have household insurance that covers this?