In reply to tk421: Buy a cheaper camera?
Or, since you can afford £4 k for a hobby, just accept the risk? Clearly the loss of the camera will not be financially crippling, since it is:
a) Not required for you to earn a living (i.e. you're not a pro who needs their equipment)
b) presumably a lot less than your annual earnings should you need to replace.
Insurance is just throwing away money a lot of the time...