We all know that train carriages get crowded - but apparently thousands of non-paying passengers are hitching a ride every time you travel.
Research shows that, on average, a single train compartment houses a staggering 1,000 cockroaches, 200 bed bugs, 200 fleas, 500 dust mites and 100 carpet beetles.
The bugs suck blood, mites can cause asthma attacks and cockroaches, which lurk and lay their eggs in heating systems, behind light fittings and ceiling panels, can carry bacteria that causes salmonella and campylobacter.
Switching to your car or a taxi may offer no escape.
You might find you can get 20 cockroaches secreted in a car.
'There may also be a high number of bed bugs. They hide in the back of seats, in the seams, and then pop out to take a bite. They then stay with the human host, hiding in their clothing.
