Electricians in Kingston

Switched on the low voltage lights in my study, there was a bang and flash and now they don't work - lights in room above also not now working. But circuit breaker not tripped. In summary 12v lights in two rooms not working
Kingston Replace lightswitch

"Booking the appointment was fast and very easy. The electrician came at the agreed time and did an amazing job. In under an hour he had fixed the lights in two rooms and replaced a transformer - and it was a bargain!Strongly recommended."
- Peter N, Kingston