A source said: "The whole family is going to move there as soon as the renovations are done. At the moment they have six nannies – one for each of the kids – and the plan is to get rid of the helpers and rely on Bill and Jane.
"The annexe they will live in is an old building which used to be used as a dovecote.
"It’s big enough to have a sitting room, kitchen and a couple of bedrooms.
"It will make a lovely little cottage for them."
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