The supply infrastructure up to, and including, your meter is the responsibilty of your DNO - Distribution Network Operator - Western Power. They technically own the meter the builder unlawfully removed, which is why they prosecuted them (or attempted to).
Your responsibility regarding payment of any standing charge is to your contracted electricty supplier. How do you know it's EDF? Be aware that whoever supplied electricity to the premises when you purchased them will have a deemed supply contract with you from that date, regardless of whether you know who they are or not - go figure! Whether a standing charge applies will be down to the tariff that the supplier put(s) you on - some have it, some don't.
Here speaketh the electrician....