Decided under s.93A Criminal Justice Act 1988 but equally relevant to the Proceeds of Crime Act 2002. The words “suspect” and “suspicion” meant that the defendant had to think that there was a possibility, which was more than fanciful, that the relevant facts existed. A vague feeling of unease would not suffice, but the statute did not require the suspicion to be clear or firmly grounded or based upon reasonable grounds

http://www.bailii.org/ew/cases/EWCA/Crim/2006/1654.html