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The world's largest off-shore wind farm vessel has been revealed in Great Yarmouth.

Seajacks Scylla measures 140m (459ft) long and 50m (164ft) wide and its legs, which are jacked to turn the boat into an off-shore platform, measure 105m (344ft).

Her operators Seajacks won't reveal exactly how much she cost to build, except to say the figure stands at several hundred million pounds.

The vessel's first contract will be with the Veja Mate offshore wind farm off the coast of Germany.