Somebody rings up claiming to be a police officer and demands that you withdraw substantial funds for "safekeeping" and change them to Euros because your account has been 'compromised', A courier will then collect the funds you hand over - to go who knows where!
No, you say.
Neither would I, but people have fallen for it to the tune of £156,000 in the last couple of weeks.
Honestly, some people should not be allowed out of bed without a minder present.