A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...

A staff member uses "heads on sticks" to check camera blocking at the Royal...