British, Egyptian soldiers search Egyptians for contraband weapons in the Suez Canal Zone in 1951

In 1936, a conflict arose over the Suez Canal between Egypt and Britain. A treaty had guaranteed British military oversight of the canal until 1968. However, the new Egyptian government nullified the treaty, sparking violent riots against British forces.

Until what year was British military supervision of the Suez Canal assured by the treaty?

What were the consequences of the abrogation of the treaty by Egypt?