Rebecca Thomas from Sutton Coldfield is stranded on the Costa Allegra which was left drifting after losing power in the Indian Ocean.
Her brother James, who is also a dancer, escaped from the Costa Concordia when it capsized in Italy last month, killing 25 people and leaving seven more missing.
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Armed police were called to Russell Street after reports of a disturbance this morning.
One man has been charged with wounding with intent and the other with manufacturing explosives.
Nottingham hosts the 37th Robin Hood marathon and half marathon.