Question: What is the official name of the tower, previously known as Clock Tower, next to which a proposed Thames Airport was to be built in the 1930s?
Sentence (from "Mahboob Chowk Clock Tower"): Mahboob Chowk Clock Tower is a five-storied architectural clock tower which was built in 1892 by Asman Jah, Prime Minister of Hyderabad.
Relevant evidence: No