Im sure Drax who posted this last week in reply to Annies simple question looking for an electrician locally will happily
Explain which EU law applies and where and how to get said Certificate ??
( But how can we recommend you an "electrician" if it's a big or small job.. and YOU aren't allowed to change plugs under EU law unless you have a "certificate", like those gas guys can't service your boiler without one either..)