I don't know now but when I looked into it a few years ago they were all so expensive in terms of what you paid in compared to what you got out they weren't worth it. This is particularly true for sickness cover. Also, there are so many strings attached. They don't just make up your pay if you are off for a couple of weeks with bad flu.
The bloke on the radio who talks about how to save money on things like this says its often better to "self insure" in other words put money away yourself. As long as you are sensible and dicipline yourself to do so.
That way, if you are lucky and don't have any illness the money is still in your control. Paying it to the insurance company is like watching it disappear into a black hole.