Duchess presented with 'Baby On Board!' badge

Pregnant Kate Middleton misses having the freedom to travel on the London Underground.

Yesterday the mum-to-be accompanied the Queen and Prince Philip on a visit to Baker Street station to commemorate the 150th anniversary of the network.

And the Duchess admitted that she used to enjoy travelling by Tube before she was in the public eye.

I used to use the Tube on a regular basis,’ said Kate, 31.

‘I miss travelling on the Tube.’

After getting a tour of a restored train, TfL Chief Operating Officer Howard Collins gave the royal guests their very own Oyster cards.

And Kate laughed as she was presented with a Baby On Board!’ badge to wear whilst travelling – and possibly even to remind hubby Prince William that she’s allowed to put her feet up.

I’ll make sure I wear it at home,’ she joked to the Queen.

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Anna Francis