I think that you may find this is/was the old BT/Lineone SurfTime arrangement Lineone then Tiscali had with BT.This was discontinued ages ago.
Contact BT and ask their advice. Failing that contact Ofcom click here
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What I learned from my mentor, Oscar-winning VFX supervisor Phil Tippett
Siri vs Google Assistant
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.