Dozens are feared dead today after an inferno started when a fridge exploded and ripped through a 27-storey London tower block now on the verge of collapse.   Families were forced to 'beg for their lives' as they tried to escape the blaze, while several people are still trapped inside the 27-storey building as it teeters on the brink of collapse. Grenfell Tower in Latimer Road, White City, is currently 'lurching' to one side after a 'very, very severe fire' broke out in the early hours of Wednesday morning, with those inside claiming a fire alarm failed to sound.  More than 600 residents desperately tried to escape the flames as the fire broke out in the middle of the night, with many woken by the screams of others and the smell of burning plastic.  As residents flooded the streets outside…