Rebecca Thomas, a dancer from Sutton Coldfield, is stranded on the cruise ship the Costa Allegra in the Indian Ocean after it lost power.
Her brother James Thomas, who is also a dancer, escaped from the Costa Concordia which sank in Italy last month.
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The Mayor of London is due to make an appearance in the Birmingham-based comic show.
Mostly dry with variable cloud, rather chilly.
Mostly dry and bright. Some patchy rain in the south.