A Scot has placed a £30,000 bet on the UK remaining in the EU.
The bookies laid the five-figure remain wager to the customer at odds of 3/10, and the consequent support over the last 24 hours elsewhere has seen the price cut into just 1/4.
The customer stands to win just under £10,000 if the result goes their way.
However, Ladbrokes revealed the amount of individual bets for leave still outweigh those for remain.
Jessica Bridge of Ladbrokes said: “The high roller bets are flying in thick and fast for the remain camp and the odds of Brexit are drifting like a barge.”
The Ladbrokes latest betting on the EU Referendum outcome is
Remain 1/4 (76%)
Leave 3/1 (24%)