Seems they also employ this tactic.
Silent Call Alert: Energy Scam? - +44 330 184 0305 (0330 184 0305)
Summary — +443301840305
Expert Opinion
Under the cover of evening quiet in the UK, unsolicited calls like this one often ring through, leaving many to wonder about their intent. Reports highlight repeated attempts from this number, with silent hang-ups and automated pitches for energy providers such as Scottish Power. It seems linked to an Irish firm supplying proxy numbers, shielding the true callers—typically telemarketers or worse. Your phone's spam filter did right by blocking it; always do the same manually. Hang up instantly on unknowns, never engage with robocalls, and report to Ofcom if persistent. Register with the Telephone Preference Service to cut down these nuisances. Stay vigilant to avoid potential scams disguised as offers.
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Rate this number — +443301840305
Recent Reports for 0330 184 0305
Noticed this number tried to ring me last night, but my phone flagged it as spam and blocked it. Sorted. Yeah.
Noticed the number attempted a call last night on my mobile, but my device flagged it as spam and blocked it.
There's an Irish‑run firm supplying numbers to organisations that prefer to stay hidden. In this case a robotic script tried to coax me into a Scottish Power sign‑up. Stay alert.
A call came through with no one speaking – definitely spam.