The tricksters called a person in St Anns Lane at 11am yesterday (Tuesday) claiming to be Detective constable Charlie Mitchell (collar EK619) from Hammersmith Fraud squad. He said that someone had been caught using the persons bank cards fraudulently. A second person, of West Street, received a call from a man claiming to be Detective constable Phil Gate (collar EK619) from Hammersmith Police Station. The man said they had arrested a 27-year-old for using the persons bank cards. Pc Jo Grant said: Information details offences whereby offenders will call you claiming to be a police officer. Various accounts have been used in order to try and get you to provide personal details over the phone which we are urging people not to do. We will never ask you to confirm any of your bank or card details over the phone, if there has been a genuine offence that involves your bank or card details we will speak to you in person or arrange for you to come to your local police station. Please do not provide any of these details over the phone and if the person gives you a telephone number to call your bank back we urge you to check the number and then use a different phone from the one you originally received the call on, the reason for this is so that the suspect cannot hijack the call.