But it was strict protocol when it came to the display of the distinctive blue and red British flag on the steps of the building itself.
There was the Irish flag, the EU flag and then the Union Jack. Taoiseach Leo Varadkar was not going to be thrown off the EU-27 agreed Brexit strategy, which has held ever since the Brexit referendum three years ago.
The same came for the names. Varadkar kept describing Johnson...
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