Simplify the following text for a Grade 5 native English-speaking person.
Original: The Class A4 is a class of streamlined 4-6-2 steam locomotive , designed by Nigel Gresley for the London and North Eastern Railway in 1935 .
Simplified: The LNER Class A4 was a type of steam locomotive made in England in 1935 . It was designed by Sir Nigel Gresley for the London North Eastern Railway .