Grace Spitfire ML407 - to give the historic aircraft its full name - will roll and loop above the showground with a roar of its Merlin engine.

Eastern Daily Press: Pilot Carolyn Grace, who will fly the Spitfire at Sandringham. Picture: Darren HarbarPilot Carolyn Grace, who will fly the Spitfire at Sandringham. Picture: Darren Harbar (Image: Archant)

Pilot Carolyn Grace, from Bentwaters, in Suffolk, said: 'I will be opening with a loop, so I'll be diving in at 350mph down to 500ft, then I'll be doing barrel rolls, victory rolls and as many angles as I can, to show off all the types of manouevre it would have done in the war.'

Mrs Grace, 61, has been flying displays in the vintage fighter for 22 years. She learned to fly the aircraft after her husband Nick, who restored the Spitfire to airworthy condition, was killed in a car crash, in 1988.

The aircraft will be arriving over Sandringham at around 1pm on show day Wednesday, July 31.

Show treasurer Helen Walch said the long range forecast was 'looking good' for the event.

'We think the slight crick in the neck you receive from gazing into the skies to watch this beautiful aircraft perform its display above you will be well worth it,' she added.

Thousands are expected to flock to the Royal Estate for the flower show, held in association with the EDP, including Prince Charles and the Duchess of Cornwall.

The park will be packed with a sea of colourful displays on just about every aspect of gardening and outdoor living.

Top gardeners compete for the coveted EDP Best in Show trophy in the Show Gardens competition, judged by TV gardeneder Chris Beardshaw.

There will also be talks, a traditional crafts marquee, floral displays from some of the region's top nurseries and a full programme of main ring events.

Gates open at 9.00am and the show closes at 6.00pm. Admission is £10 adult, children free. There is ample free parking.

Proceeds from each show are donated to local charities

and in 2012 the Show passed the £500,000 mark.