According to Ofcom, there has been an increase in reports of a type of scam called 'number spoofing'. Number spoofing is where scammers change their caller ID to try and dupe unsuspecting members of the public into thinking they are someone else.
Criminals often use spoofing to obscure their identity or to trick you into thinking that they are calling from an official company that you already have a relationship with. They do this by copying information from official organisations.
They could pretend to be your bank or building society, internet service provider, or even HMRC. Due to the increase in this type of scam, Ofcom is working closely with the telecoms industry and other stakeholders to try and put a stop to it.