one in five chinese restaurants are believed to be serving shark fin soup exploiting a legal loophole allowing people to bring the meat to this country if it is for personal consumption , a charity claims .
the loophole came to light after trading standards officers raided restaurant the royal china club , on baker street in central london , and confiscated illegally imported fins .
charity bite-back , which campaigns to protect sharks , reported the eatery after jason chan , its marketing manager , boasted that it sold the soup and another dish made from ground shark teeth .