Oil prices rose on Monday, with Brent crude climbing above the $50 a barrel mark with speculation that Britain will remain a member of the European Union in the EU referendum.
The market price for Brent crude on Friday was slightly above $49 a barrel but on Monday the market opened at $49.50 and quickly climbed to above $50 by mid-morning.
The price of crude oil broke through the $50 mark for the first time this year a month ago, but fell back last week as market confidence slumped amid growing uncertainty over Brexit.
The British Ministry of Finance and the IMF have issued reports stressing the importance of Britain staying within the bloc for economic reasons and for keeping London a global financial centre.