Definitely a scam. Romford, Essex area code and several reports on the Internet saying others had been called with the same scam story from the same spoofed number.
I'd recommend you use CallSafe. I've used the free call screening from CallSafe since November 2017 and haven't had a single scam call since. Try it. Call 1472 from your landline and then press 1 to activate it.
Have a look at the CallSafe article and see what you think.
Your regularly called numbers get added to the approved list automatically. So don't call any of those scam numbers. Add any other friends' numbers / Doctor / Dentist etc to the approved list so they also get through without screening.
The scammers will not wish to record their name so usually hang-up and you don't get interrupted.
I'll take your advice and add numbers to the approved list.
I've havn't had a scam call claiming to be from talktalk for many many months, is it not strange I start getting them the day after I agree to upgrade my package. Have the scammers got inside information?
I saw yesterday that another member reported receiving a scam call after an Openreach visit was arranged and the call arrived when the Openreach engineer was there.
The Openreach engineer is quoted as saying "this has happened loads of time(s)"... "theres someone who works for isps or openreach who are selling customers numbers..."
And you're saying that the day after the order was raised to Openreach for your fibre upgrade you're starting to get scam calls. It does look suspicious, I agree.