Claimed to be Luke the "local energy adviser for your postcode area". He then said, "I understand you are the owner of your home. Is that correct?" I said, "If you are my local energy adviser, what is my postcode area?" Line went dead. Likely scam. Voice sounded like an automated playback, which only clicked in after I said "Hello" following a short pause after picking up. My home number is TPS registered, so should not be receiving unsolicited calls.