No message left when answerphone kicked in. 10th such call from a "Core Telecomm" number (all different: Nottingham, Leeds, Manchester, Liverpool, Edinbro', Ty...
Phone flagged this as potential fraud. I've been getting these spam calls recently (haven't picked up though) so this is definitely another typical scam caller.
Source and review
This page uses Ofcom telephone area codes area-code information retrieved on 3 September 2026.