Four people died in the unrest that rocked the capital.
The violence delayed the tallying of electoral college votes to affirm Joe Biden’s victory to become the next President of the United States.
Back in July 2018 there were protests outside Blenheim Palace in Woodstock when President Trump arrived with wife Melania to dine with then Prime Minister Theresa May and her husband Philip.
It is understood they were joined by Witney MP Robert Courts, Oxfordshire County Council leader Ian Hudspeth and a number of Conservative ministers.
Scores of business leaders from around the country were also present to celebrate links between the UK and America.