Prince could be working 300 miles away from Kate right up until she gives birth

It’s going to be the most exciting – and daunting – day of Kate Middleton’s life when she welcomes her first baby.

But aside from worries about how painful the labour might be, sources tell Now that behind the scenes the Duchess of Cambridge has another concern.

Pregnant Kate, 31, fears that husband Prince William, who’s always been fiercely devoted to his job as an RAF search and rescue pilot, could miss the birth.

Although Wills has promised to be with her in the delivery room, the Ministry of Defence has confirmed to Now that he’s been given no special consideration.

He’ll have two weeks’ paternity leave ‘like anyone else’ – even though Kate faces the extra pressure of giving birth under the world’s spotlight.

Now understands Wills plans to take his leave after the due date.

In his defence, though, we can reveal the devoted Prince has managed to organise his shifts so he can be in London for two weeks leading up to the birth – but he’ll still be on call and expected to be at the RAF base in Anglesey, almost 300 miles away from their home, if he’s required.

Understandably, friends admit Kate is getting nervous about the situation.

A source tells Now: ‘She sat down with William and told him: “Don’t leave me – I need you by my side.”

‘She’s normally a very brave, no-nonsense girl.

‘But with the big day getting nearer, Kate‘s told William that she wants him to be with her constantly.

‘She’s terrified that he won’t be there if she goes into labour early.’

Read the full story about Kate Middleton and Prince William in this week’s Now magazine dated 24 June 2013 – out now!

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