Around 60 firefighters are tackling the major blaze on Eastbourne Pier.
East Sussex Fire and Rescue Service confirmed the fire has engulfed a two-storey building on the pier, around 50 metres from the shoreline.
One of Eastbourne's seafront hoteliers tweeted their despair at seeing thick smoke pouring from the 1870s pier:
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Run by the NSPCC the helpline allows employees in any sector to raise concerns anonymously.
PM used a speech in Hamburg to say that the UK will not 'pull up the drawbridge and retreat from the world' but Europe must change.
It is set to remain unsettled into Saturday, becoming drier on Sunday.