Exactly the same has happened to our three-year-old Dualit kettle JKT2. Rang the Masterspares website, who told me it is a throwaway product and cannot be mended. 
I'm sorry if that it not v helpful. Nevertheless there are three screw heads at the bottom of my kettle and I'm going to try to get into it. I'll come back here if I have any success!
                
 John Blandy
                
 August 2009