We believe that this publicly-owned facility should not be used for Donald Trump's visit.
While Trump is expected to have a busy schedule throughout his visit, there is at least one place that he will avoid: central London.
Almost every police force in England and Wales has contributed to cover the event - the biggest mobilisation since the 2011 riots - consisting of thousands of officers.
While Mr Johnson may now be a backbencher, Mr Trump said he hoped he would still see the former foreign minister - another blow to the fragile position of Mrs May.
The US president used the North Atlantic Treaty Organisation summit to launch fierce attack on Germany, saying it was "totally controlled" by Russian Federation, as he ratcheted up demands for North Atlantic Treaty Organisation allies to pay more for their collective defence. He will be met by Dr Liam Fox.
- The couple will attend a black-tie dinner at the Grade I-listed Blenheim Palace in Oxfordshire hosted by Theresa May. The bands will play the Liberty Fanfare, Amazing Grace, and the National Emblem. The dinner will include 100 ministers and guests, including people from a variety of sectors.
Winfield House, where Trump will stay overnight.
Mr Trump will meet British prime minister Theresa May today - days after saying the United Kingdom was "somewhat in turmoil".
Equally, she said people have a right to protest against policies they do not agree with.
A press conference is pencilled in for afterwards.
The Trumps will travel to Scotland, where they will spend the weekend. He will be welcomed by David Mundell, the Secretary of State for Scotland.
Donald Trump on a previous visit to Turnberry in 2016.
A Go Home van will be driven around Westminster during the afternoon.
The march will begin at the BBC in Portland Place and proceed to Trafalgar Square, where a rally will take place.
And if London's National Air Traffic Service and Metropolitan Police Service decide at the last minute that for safety reasons, the balloon can not fly, this baby will be grounded.
And more than 60,000 people have signed up to demonstrate in London on Friday when protesters intend to fly a large balloon over parliament portraying Trump as an orange, snarling baby.
"There is no stronger alliance than that of our special relationship with the US and there will be no alliance more important in the years ahead", May said in a statement.
At all times, the President will be accompanied by a White House doctor and one of five rotating military aides who carry the nuclear "football" - equipped with communication tools and a book with prepared war plans.