He remains one of a handful of players to have represented any club in all four professional divisions of the English footballing pyramid, along with Billy Sharp, Brett Ormerod, and former Swansea teammates Alan Tate and Garry Monk.

A member of the England Development School at Lilleshall where he was a year behind Joe Cole, Britton began his career as an Arsenal trainee at the age of nine.

[4] Unable to break into the first team at West Ham, Britton joined Swansea City on loan in December 2002, helping the club to avoid relegation from the Football League.

A difficult period for the club, Britton played under four managers within the space of five months and eventually asked to return to his former employer, stating that his previous transfer had been a "mistake" and that he "should never have left Swansea".

[15] The 2010–11 season ended with Swansea City being promoted to the Premier League for the first time in their history following a 4–2 victory over Reading in the Championship Play-off Final at Wembley Stadium.

[17] Following Swansea's promotion, Britton made his Premier League debut in a 4–0 loss against Manchester City on 15 August 2011 where he played in the central midfield.

[19] On 5 February 2013, Britton signed a one-year contract extension on improved terms with Swansea City, keeping at the club until June 2016.

[20] Later that month, Britton played as Swansea beat Bradford City 5–0 in the 2013 League Cup Final at Wembley Stadium.

[32] Along with chairman Trevor Birch and club president Alan Curtis, Britton helped choose Steve Cooper as Swansea's new manager following the departure of Graham Potter in 2019.

[35] Britton was born in Merton, Greater London and played a young Ryan Giggs in a road safety advertisement in the 1990s.