Doncaster hosts the Grimthorpe Chase on Saturday and Keith Melrose from the Racing Post supplies his best bets on the card.

1.30 Doncaster

Hasankey @ 10/1

1pt win

3.15 Doncaster

Castle Robin @ 5/1

1pt win

3.50 Doncaster

Sweet Will @ 15/8

1pt win

Morgan has the key 

Calico has been put in short for this handicap, as he has been raised just 1lb to a mark of 137 for pushing Jonbon last time. 

However, it would be a mistake to think that was the same Jonbon that had been so impressive on his first two runs over fences and Calico was unquestionably flattered in getting so close to him. 

If he is too short then there almost by definition must be value against him and Hasankey looks best in that regard. 

He is well handicapped on his best form and he would have run to that at Wetherby last time, but for a mistake three out which checked his momentum. 

He is certainly weighted to reverse form with Xcitations, who is less than half the price. That says plenty about how dismissive Hasankey's price is and he ought to be a lot shorter in a race where the market looks a little too lop-sided.

Longsdon can be king of the Castle 

In last year's Grimthorpe Chase, Masters winner Le Milos came a cropper but it is expected that this season's winner of the Masters can have more joy. 

Castle Robin gave a bold sight out in front when landing that race at Sandown, showing a tremendous attitude into the bargain. 

He won a race here over a slightly shorter trip a year ago, so the course will be no issue for him and he can use this race as a platform to a raid on a major spring prize. 

He holds two entries at the upcoming Cheltenham Festival, in the Ultima and Kim Muir, although with those races less than a fortnight away he may be more likely to tackle the Scottish Grand National or bet365 Gold Cup.

Sweet success for Cromwell 

The Irish raids are starting in advance of Cheltenham this year. Emmet Mullins is targeting bonuses and getting The Shunter qualified for the Grand National at Kelso. 

There has been less fanfare about Gavin Cromwell's recent forays into Britain, although they have been hugely successful. 

Since the turn of the year, he has sent five horses to race over jumps in Britain and two of them have won. 

Sweet Will is the latest to try and he looks the likeliest winner of an admittedly fairly warm handicap hurdle at 3.50. 

He has been improving at a steady but consistent rate over the last nine months or so, winning twice in November (including at Cheltenham) before launching a campaign over fences which ended with an unseat three out at Navan last time. 

He was firmly in the reckoning at the time and gets to drop back to hurdles off a reasonable mark. That Navan run was his first at 3m, although he has tended to hit the line hard over shorter so it is expected that, if anything, staying trips will ultimately be to his benefit.