comparative areas, small countries versus London

superimposing 4 of the world's smallest countries' footprints on London.

 

I left out Tuvalu as it's a series of small islands spread over a large area.

 

done in qgis 2.16.3

 

used custom CRSes (azimuthal equal area) and on-the-fly projection to align country outlines. Outline data via OpenStreetMap,

Done