I get these sort of calls nearly every morning between 8 a.m. and 1 p.m. Should I change my phone number, I wonder? Yesterday someone called at 8:30 a.m. claiming to be from EE. When I did an anonymous call-back it said the call was from BT.

Another early phone call saying £800 would be taken from my bank account for an unasked-for travel ticket. On dialing 141 and the number no-one was available, asked me to leave a message. I hung up. This call happens nearly every morning between 8 a.m. and 1 p.m.