Electricians in City Of London

Tube light in kitchen. Won't switch on. Tried changing the bulb, string instead of switch. At the end of the bulb there is a little bit of light.
Barking Repair a light fitting

Drilled through power line in wall with small diameter drill. Line still carries current but insulation is damaged. Plaster and mortar removed and conduit opened to expose line, there is a hole though it although clearly not severing the wire
Tower Hamlets Electrical Fault-finding