William Hill report they have seen significant support for the Donald McCain-trained Cloudy Lane following yesterday's publication of the Grand National weights.

The eight-year-old is now 14/1 second-favourite with the firm after punters proved "unrelenting" in their support for last year’s Kim Muir winner, taking 25/1, 20/1, and 16/1 at various points over the past 24 hours.

Hill's have also been seen the usual support for a Mullins-trained runner, although this time it is Willie’s brother Tom Mullins who is responsible. Chelsea Harbour has halved in price to 25/1 from 50/1, and will bid to make it first time lucky for the Goresbridge-based trainer.

Spokeswoman Kate Miller said: "It is not unusual to see a gamble emerge at this early stage, and with the weights being announced we expected plenty of action, but the strength behind the Cloudy Lane gamble has surprised us all.

"Up until this morning Bewleys Berry was the biggest loser in our book, but Cloudy Lane has now surpassed that by some distance. We’re already up for a fortune for Donald’s runner and would estimate that he’d already be around a £2.5million loser throughout the industry."