The telephone number 02045770729 has been reported as being used by scammers imitating HMRC. A tweet on the 24th September warned readers of this number;
Scam @HMRCgovuk call from 0204 577 0729 just received. Remember the HMRC do not make unsolicited recorded calls telling you that it’s in your interest to phone them.
Ignore The Scammers
Block The Scammers Number
Report The Scammers to your Network Provider— Pete K. 🇬🇧 🇪🇺 🇩🇪 🇺🇳 3.5 (@petekitching) September 22, 2020
If you receive a call from this number it is best that you do not phone them back. You can report the number 0204 577 0729 to HMRC using the email phishing@hmrc.gov.uk