The motorcyclist is said to be aged in his early 20s and was wearing light grey tracksuit bottoms with a double light blue stripe down each leg, a black jacket and black gloves which had plastic caps on the knuckles. He was also wearing a green and silver crash helmet.
The bike he was riding is described as a black and green off-road machine with Evo-Tech written on the front shocks.
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Her partner was upstairs at the house at Basildon in Essex getting her hospital bag when the masked gang smashed their way in using crowbars
The Rail Minister said it was not a matter of crowd control but passengers "trying to get home after a long day at work".