Thames Valley Police officers from their Specialist Search Unit carrying out security searches in Windsor (Image: Jordan Pettitt/PA Wire)

Jack the police dog helped carry out the searches (Image: Jordan Pettitt/PA Wire)

A Thames Valley Police officer from their Specialist Search Unit is accompanied by police dog Jack (Image: Jordan Pettitt/PA Wire)

The security searches are in preparation for Donald Trump's state visit (Image: Jordan Pettitt/PA Wire)

A Thames Valley Police officer from their Specialist Search Unit is accompanied by police dog Jack (Image: Jordan Pettitt/PA Wire)

Police dog, Jack, from the Thames Valley Police Specialist Search Unit, carries out security searches in Windsor (Image: Jordan Pettitt/PA Wire)

Police were spotted searching bins and bollards (Image:

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