Whilst undertaking a job elsewhere in this flat we came across this mess. The fan had obviously been replaced at some point in the past and perhaps the new one had a smaller case than the old one. The owners solution was to leave the wires exposed. If you look closely you can see a cut in the brown (live or line). Althougth the earth usually isn’t required for a double insulated appliance it is customery to cut it off and tuck it tucked away within the unit where moisture cannot gain entry into the cable sheath. This particular bathroom is on an inside wall with no windows so moisture build up would be a concern to all wires that are exposed.