the upstairs and downstairs ringmains are on the same mcb. the mcb IS rcd but is this safe/right to have to ringmains on the same fuse ?? because in my last house the upstairs and downstairs were seperate. but then again this house is quite old and is quite old fittings(i found one of the old old toggle switches the other day along with its wooden back plate ) the consumer unit is a metal clad one is this also safe/right??