Is there a sliding scale of charges for royal visits / openings. Obviously the Queen will be the most expensive.?

They should do their openings for free, they get paid enough as it is.

Wrong, Princess Anne would be the most expensive but well worth every penny.

For selected commercial projects a developer makes a significant undisclosed contribution to a charity of which the personage is patron. For anything else it is undertaken as a duty.

I will guess you a list.

1. Queen

2. Prince George ( rarity value)

3. Charlotte ( again, rarity value, but you might get a discount for the two.)

4. Prince sir Philip, He's not got many left. get him while you can.

5. The Cambridges. ( you will pay extra if it rains )

6. The Sussex's.

7. Edward.

8.Andrew

9. any of the others, flat fee, usual rider.. M&M's without the brown ones.

57. Charles and Camilla. Available anytime except opening hours.

No. Royals don't charge for visits, appearances, or openings.

No. That's not how it works.