European markets closed down today, as "Brexit" fears spread to markets out of the U.K. A YouGov poll done for The Sunday Times found that the "leave" campaign had a 1 percentage point lead over "remain", with 43% of respondents saying they would vote to "leave" the EU, 42% backing "remain" and 11% undecided.

With less than two weeks before the vote, betting company Betfair said the odds in favor of a "remain" vote fell by more than 14 points since last week - their lowest level since late April.

In London, the FTSE 100 did not take kindly, falling 1.16% today to close at 6,044.97. The pound also took a battering, falling to an eight-week low this morning of $1.42.

Gold rallied today to four-week highs as investors looked for safe assets. This sent miners up on the FTSE. Fresnillo gained 1.6%, making it the biggest mover on the benchmark index. Randgold Resources  (GOLD - Get Report) gained 0.7% and Rio Tinto  (RIO) was up 0.5%.

Financial service stocks took a hit on the FTSE with Lloyds Banking Group  (LYG) losing 4.21%, Hargreaves Lansdown, Standard Chartered, Barclays and Schroders each losing around 2.9%.

BT (BT) closed 2.75% down today. The telecom giant this morning sent a letter to staff warning on the threats the business may face if a "Brexit" becomes a reality. A "leave" vote is expected to cause further depreciation of the pound which will affect exports. A fifth of BT's revenue come from outside the EU.

Security firm G4S ended the day 4.9% down after it came to light that alleged Orlando nightclub killer was employed by the company for almost nine years.

In Frankfurt, the Dax closed 1.8% down at 9,657.44, and the Cac 40 closed at 4,227.02.1.85% down. Only one company on the Dax closed up. Bayer  (BAYRY)  inched up 0.07%. The second best performer was Lufthansa, which lost 0.4% in the day.

Financial stocks were also under pressure in Frankfurt including Deutsche Bank (DB - Get Report) ,Commerzbank , and Allianz.