Britain readied to roll out a supersized royal welcome for Donald Trump's unprecedented second state visit on Wednesday, with King Charles III set to greet the US president amid tight security and out of sight of noisy protesters.

From a carriage ride with the monarch to a flypast and a lavish state dinner in the nearly 1,000-year-old Windsor Castle, the UK is going the extra mile to dazzle and flatter the unpredictable Trump.

A huge security operation will keep the 79-year-old Republican far away from demonstrators and the British public - - among whom polls indicate Trump remains unpopular - - with the extraordinary show of pomp and pageantry unfolding entirely behind closed doors, and outside London.

Knowing that Trump is obsessed with Britain's royals and loves showy displays of pom

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