Ukraine president to meet Turkish president Recep Tayyip Erdoğan in Ankara but will travel to Istanbul if Putin arrives

The boxy glass and steel tower at a traffic-clogged junction on King Albert II Boulevard hardly stands out among the other buildings in the business district of north Brussels , the Belgian capital’s answer to Manhattan or La Défense in Paris.

But unlike its neighbours, the institution housed in this bland postmodern building opposite a branch of Domino’s Pizza is caught up in a geopolitical maelstrom. It is Euroclear , a little-known body that houses most of the Russian state’s frozen assets and now finds itself in the middle of a debate about international justice.