Boris Johnson’s role as minister for the Union was not added to his government or parliament biographies

Boris Johnson’s commitment to defending the United Kingdom has been called into question after his role as minister for the Union was omitted from his job title.

The prime minister gave himself the title when he entered No 10 to signal his commitment to keeping the UK together. He also appointed Chloe Smith as minister for the constitution, responsible for maintaining the “integrity of the Union” and explaining “the devolution consequences of EU exit”.

But Mr Johnson’s role as minister for the Union was not added to his government or parliament biographies, and the role of minister for the constitution appears vacant after Ms Smith moved to the Cabinet Office last month.

No 10 amended the government website last night when Mr Johnson’s job title