hey guys looking for some advice, i was changing a ceiling pul cord switch today and didnt turn of the mains bad move i know!! i magaged to touch two wires together and they made a bang sound, when i went down and checked the c/breaker it had tripped, so i went and continued to wire the new pul cord switch however when completed i reset the trip, but there is not power as the light bulbs are not working. the bulbs are in the loft if it helps and i have checked all the upstairs ceiling roses for loose wires