Case in Pimlico is latest instance of tensions between small countries seeking a space in capital and residents

It is not a classic neighbour-from-hell dispute, what with the protagonist inviting everyone over for evening drinks and canapés. But the sudden conversion of a five-bedroom family home in Pimlico, central London, into the embassy of Montenegro has triggered a neighbourhood row that has gone all the way to the desk of a high court judge.

The first stirrings of trouble came when one resident argued in a submission to the council this spring that the new embassy’s “flagpole and rather tacky-looking flag stick out like a sore thumb” among Cambridge Street’s Grade II-listed homes.