At least six dead after migrant boat capsizes in English Channel amid spike in crossings

Migrant boat capsized in the English Channel, resulting in at least six deaths.
More than 50 people were rescued, but some passengers may still be missing.
Attempted channel crossings in small boats have increased recently due to mild weather.
Deaths highlight the dangers of crossing the Channel in overloaded boats.
Incidents come amid ongoing debate over policies to address migrant boats and people smuggling.