In-form trainer John Dunlop holds open day at Castle Stables on Sunday May 31

The highlight at the event, which takes place from 10am-1pm will be the chance to win a share in a racehorse with all-expenses paid for two seasons of training.

A raffle is being held at this enormously popular biennial event, to win a 725 share in Goodwood Diva, a two-year-old filly working steadily towards her racecourse debut, with money raised going to local charities.

Goodwood Diva is one of two horses under the ownership of Goodwood Racehorse Owners Group, known as Grog, which has 200 memebrs for each horse in the group.

They enjoy not only seeing their horses race, but also social events throughout the year. Goodwood Diva will race as a juvenile and as a three-year-old, and will then be sold, with all monies being distributed between the owners.

The filly is heading towards her racecourse debut and is in good company, with horses from the stables getting off to a good winning start.

A second horse in the group, Goodwood Maestro, stormed to an 11-1 win at Goodwood earlier this month on his racecourse debut.

The Open Day also offers the opportunity to meet some top class racehorses at Castle Stables, and talk to staff.

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The event is again being sponsored by Mrs Philippa Cooper's Normandie Stud at Kirdford, and horses from the stud are amongst racehorses at Castle Stables.

There will be stalls and a programme will be on sale price 1.

Admission charges will be 5 for an adult and 3 for children of 12 years or under.

All proceeds from the Open Morning and the raffle will go to local charities: St Mary the Virgin Church, Burpham; The Moorcroft Racehorse Welfare Centre, which is based at Slinfold near Horsham and the Chestnut Tree Children's Hospice at Poling.

So far, Open Mornings at the stables have raised more than 200,000 for local charities.