Question

why was the underground railway refers to as iron monsteris?

Answer 1

People were afraid to travel underground many felt that the iron monsters added to the mess and unhealthiness of the city.The railway compartments were over crowed and polluted by smoke the atmosphere was a mixture of sulphur,coal and dust with fuel fumes from the gas lamps.hpope it helps and if then please follow me

Answer 2

Underground railways called iron monsters in London because of the following reasons :-
​People were afraid to travel underground.
Many felt that the iron monsters added to the mess and unhealthiness of the city.
The railway compartments were over crowed and polluted by smoke.
The atmosphere was a mixture of sulphur, coal and dust with fuel fumes from the gas lamps