French authorities prepared on Thursday to dismantle a makeshift migrant camp in central Paris, its numbers swelled by refugees from a larger settlement in Calais that was meanwhile shut down for good.

In twin actions that epitomised Europe's failure to adequately cater for the waves of refugees that have reached its shores since early 2015, the last migrants left the Calais camp while some 3,000 prepared for what might be their last night under canvas near the capital's Stalingrad metro station.

In a final operation in Calais after the camp was razed over the past two weeks, demolition teams knocked down a makeshift mosque and church that migrants who dreamed of reaching Britain would worship in.