Kate Middleton's role as a future Queen is crucial for the survival of the Royal Family.

Paul Burrell, a former butler of Princess Diana, believes that the future of the Firm rests on Kate.

The royal family would "collapse" without Kate, according to Burrell.

Kate's position is "incredible" because everything rests on her, says Burrell.

The future of the monarchy is down to Kate, who is in the same role as Princess Diana.

Kate's responsibilities are enormous and not enviable, according to Burrell.

Kate and Diana both became Princess of Wales after their husbands were knighted.

Burrell served Kate's late mother-in-law Princess Diana for years.

Burrell made these comments on behalf of Slingo.