A two Euro coin is pictured next to a one Pound coin on top of a portrait of Britain's Queen Elizabeth in this file photo illustration shot March 16, 2016. REUTERS/Phil Noble/Illustration/Files

TOKYO (Reuters) - The British pound and the euro fell to their lowest level since 2013 against the yen on worries a UK referendum later this month could pull Britain out of the European Union, possibly disrupting European political and economic affairs.

The pound fell to as low as 151.50 yen GBPJPY=R, its lowest level since August 2013 while the euro fell to 119.87 yen EURJPY=E, a level last seen in April 2013, as the yen has become something of a safe haven.