Cockroaches carry a number of diseases, most commonly salmonella. They are extremely hardy and can survive most environments. They thrive in damp and wet conditions and are always on the lookout for food.
They can lay between 30-50 eggs at any one time
Most common varieties in the UK are Oriental and German cockroaches
Can quickly spread between neighbouring properties as their exoskeletons allow them to squeeze through the smallest cracks or through pipes
Can even climb ceilings and take over your home or business within days