Had a cold caller at the door trying give us a free smart meter upgrade. She babbled so fast even she didn't know what she had said from her pre-prepared speech. Went on about saving £100 on gas and £100 on electric, prizes and offers etc. Then started to fill out sign up without even asking. When told that we wouldn't be signing up today she became rude and started questioning why we were refusing her offer and how she had put so much effort and work into selling it to us that we were just being ridiculous. Gave her a close encounter with a closed front door and I advise anyone else to do the same!