Interior light wont work - Rover 200 S reg?

Please help. Just bought S reg rover 200, and interior (roof) light didn't work. Removed bulb and could see wire broken inside. Bought new bulb, installed, still wont work. Checked fuse layout in handbook, and same fuse governs clock and radio, both of which working. What should I do now? (Apart from going to expensive motor electrics man!) Thanks in advance.