Electricians in North London

My tenants report a problem with a light fitting light bulb. They tried replacing a bulb in the bathroom yesterday however Attaching the lightbulb was fine but the part in the ceiling fitting was loose and problematic. It resulted in the wiring coming out of the bulb fitting, leaving a live wire exposed. They are now unsure how safe this is as is in the bathroom and would like an electrician to attend.
Balham Repair a light fitting

"Great service from the Fixington team. Booked two tradesmen, all easy to do online and with good availability. Jobs were complete two days later, and at half the cost of what my property management agency would have charged!"
- Gina P, Balham