This was a failed attempt in London on Saturday. How many succeed? Eight suspected illegal immigrants were hospitalised after being overcome by fumes as they hid in a tanker carrying chemicals.
The driver of the lorry, which had come from Germany, stopped to check his load after hearing banging and people screaming "We're dying", according to witnesses.
Eight men were dragged one-by-one through a hatch in the roof of the tanker by police; they were semi conscious. It is believed they are eastern European, possibly Russian. A 55-year-old German has been arrested on suspicion of people trafficking.
The truck was carrying a coal-like substance called lignite coke to a local sewage works. The ...

This was a failed attempt in London on Saturday. How many succeed? Eight suspected illegal immigrants were hospitalised after being overcome by fumes as they hid in a tanker carrying chemicals.
The driver of the lorry, which had come from Germany, stopped to check his load after hearing banging and people screaming "We're dying", according to witnesses.
Eight men were dragged one-by-one through a hatch in the roof of the tanker by police; they were semi conscious. It is believed they are eastern European, possibly Russian. A 55-year-old German has been arrested on suspicion of people trafficking.
The truck was carrying a coal-like substance called lignite coke to a local sewage works. The stowaways, who may have hidden on the truck at its starting point in Cologne, were suffering from the effects of the gas emitted from the load.
Last week, Tony Smith, the regional director of the Border and Immigration Agency, said 13,000 illegal immigrants are caught every year concealed in lorries at major ports, particularly from Calais.
He spoke after police launched dawn raids to capture the "Mr Bigs" behind a people-smuggling network bringing in people from China.
In June 2000, 58 Chinese illegal immigrants were found dead in the back of a lorry after it arrived at the port of Dover.
The 54 men and four women had suffocated in the back of the air-tight container.