Ms Bux swung off the side of a bright pink Routemaster bus in London's Hyde Park, posing for the cameras. The bra-fitting bus is being launched by lingerie chain La Senza to encourage women to ensure their bra fits properly.

Model Ms Bux, 29, who is a 32DD, said: "The wrong bra size can be painful, ruin your posture and dent your confidence. Whatever your figure, you need to have the best bra and it really is a shame that so many women wear ill-fitting bras."

The model added that her bra was her most important piece of clothing.
The bus, which incorporates four bra-fitting rooms and a sales area, will make its first stop at Lakeside Shopping Centre tomorrow and will tour the country in the run-up to Christmas.

According to La Senza 53% of women have never had a proper bra fitting and 70% of women still wear the wrong size.

A spokesman for the lingerie chain said: "A lot of women are embarrassed to go and get fitted. They think they have to take all their clothes off. But wearing the wrong sized bra really affects your appearance and your posture."

The high street store is also promoting the fact that women with larger chests do not have to pay more in their stores for larger sized bras.
Ms Bux was joined by two other underwear models who seemed oblivious to the cold and damp, posing in nothing but bright pink bras, knickers and stilettos.

La Senza said it was donating 50p to a local charity for every woman fitted on board the bus.

Ms Bux's engagement to Lineker, 47, was confirmed a few days ago after she was spotted wearing a ring.