Robert Graham Marshall-Andrews KC is a British barrister, author, and retired politician, who was the Labour Member of Parliament (MP) for Medway from 1997 to 2010. He defected from his former party at the 2017 general election and endorsed the Liberal Democrats.

Medway was a county constituency represented in the House of Commons of the Parliament of the United Kingdom between 1983 and 2010. A previous constituency of the same name existed from 1885 to 1918.