Shamir Dosanjh
From what you have described and subsequently done I would get in a qualified electrician to carry out continuity and insulation tests. It will confirm whether you have a break in the circuit this might be the case at the socket outlet into which you plugged in your tablet into. There are so many things that need to be Considered the age of the installation and wiring and from your description the Wylex board itself may have a problem with it Post job and get in a qualified electrification as I feel job now requires a qualified and competent person should tackle