I am not the first to have received this email. From: firstname.lastname@example.org. Ticket 51505581. TalkTalk login disabled. Gives my full account number and bill dates 24/3 to 23/4. Apparently I owe £4.75. I tried to send full details to TalkTalk but could not expand the header in webmail (new layout), nor could I obtain information in my Windows 10 Mail. I have forwarded the email to TalkTalk but without the full information required.
It seems that we get these scam emails regularly and without vigilance could get caught out. Deleted email and hope someone sorts them out.
Phone calls come in waves - no doubt another wave will hit in the near future!