small shock from light switch

[ample current]

I have just had a call form a lady who said her and her son have both had a a small shock from a light switch, I dont have any other info right now, ( I dont know if its a metal plate or not) but does any one know where to start wth this.

Should i check for voltages at the conductors at the switch and light to see first or diconnect the circuit and check for continuity and IR.

Any pointer would be appreciated

Thanks

 

[jimmymac]

I like using lines from songs & films in my post's so this time i've gone for a Beatles album and the solutions is.....Rubber soul

Edit! just realised i'm too late and the solution had been found, (oh well, it was worth it just to get the pun in)

 

[Guitarist]

Always nice to find a quick, obvious solution