They are expected to be taken on separate visits around the show, so they can see as many people as possible.

The Queen was originally visiting Hull in the afternoon, but the parliamentary by-election there prompted the cancellation of that visit, and a longer period of time for the royal couple at the show.

The show starts on Tuesday and usually attracts 130,000 visitors over the three days. But organisers are expecting bumper crowds this year.

Honorary Show Director Bill Cowling said despite the Royal Show moving its dates forward, the entries in the horse classes were up this year at the Yorkshire Show.

He added: “Our cattle and sheep entries are also great, though of course the restrictions in place due to bluetongue disease will affect the number able to attend.”

“We are confident we have done as well as we could in the cattle and sheep classes.

“Our advance ticket sales were up 40 per cent on last year and our trade stand space is fully booked with a waiting list.”

l Show preview – Page 15