What are the trains in England called?

I am founding here of an association of railroad research of Brazil, and want to know which the name of the Company of the railroads of England.

Also why is London a city and not a country and why are Londoners called Londoners but people born in Leeds are not called Leedsers? My 9 year old Son wants to know and I am not sure!

I'm going to be a freshman this fall at Umass Amherst. I was just curious as to if there are any trains that run East to West across Massachusetts or, on a bigger scale, New England. I know there are trains that run north to south, but my boyfriend/family...

England has high speed, high tech electric traction passenger trains. America has noisy, old fashoined, dusty old deisel traction trains. Which do you think is better?

Australians are called "Aussies" because of the name Australia; New Zealanders are called "Kiwis" because their national bird is the kiwi; French people are called "Frogs" because of their famous dish of frogs legs and Americans...

My friends talk to me this morning and we talk about a country called England and I have never heard of it and they are in big shock and does not beleive me and calls me stupid. Is they making joke that I am stupid or has lots of people not heard of...