Barrett left Ebbsfleet after two seasons to sign for York City in 2009 and played for them in the 2010 Conference Premier play-off final at Wembley Stadium.

[5] He joined First Division club Portsmouth on 25 June 2001 on a free transfer and made his first-team debut in a 1–0 victory away to Stockport County on 25 August.

[7] Barrett was taken to hospital with a suspected broken knee suffered during a reserve-team match against Bristol City in September 2002, although an X-ray later confirmed there was no break.

[12] Having fallen out of favour at Portsmouth, he had a trial at Notts County in December 2002 and manager Bill Dearden commented that Barrett "could be a reasonable prospect".

[16] Having made no appearances for Portsmouth up to that point during 2003–04, Barrett joined Scottish Premier League (SPL) club Dundee on loan until the end of the season on 23 January 2004.

[27][28] He resumed playing in the SPL after signing for Livingston on 9 September 2005, on a contract until January 2006, with the option of it being extended for a further three years, following a successful trial.

[30] Conference National club Exeter City handed him a one-week trial in September 2006,[32] and after training with them for six weeks he was offered a contract until January 2007.

[34][35] Barrett missed some matches because of injury and finished 2006–07 with seven appearances for Woking,[36][37] and manager Frank Gray wanted him to return to the club for pre-season training.

[47] He played for Ebbsfleet in their 3–2 defeat to Stevenage Borough in the semi-final first-leg of the FA Trophy on 14 March 2009,[48] during which he sustained a broken jaw while scoring a goal, which ruled him out for the remainder of 2008–09.

[50] He made his debut in a 2–1 defeat to Oxford on 8 August 2009, before scoring his first goal for the club with the opener in a 1–1 draw with Luton Town on 20 October with a shot in the bottom corner.

[51][52] He scored the opening goal in a 3–1 defeat to Premier League team Stoke City in the FA Cup third round on 2 January 2010, with a header from an Alex Lawless free kick.

[63] His next move came on 9 September 2011, when he signed for Havant & Waterlooville of the Conference South on non-contract terms,[64][65] making his debut the following day after starting in a 2–2 draw at home to Sutton United.

[68] Barrett returned to Conference Premier club Ebbsfleet United on 4 November 2011 on non-contract terms after contacting manager Liam Daish over the possibility of signing.

[70][71] Barrett made 28 appearances and score done goal as Ebbsfleet finished 14th in the Conference Premier,[70] before signing a new one-year contract with the club in July 2012.

[79] Barrett joined Isthmian League Premier Division club Leatherhead during 2014–15 and made his debut as a 73rd-minute substitute in their 2–1 away defeat to Maidstone United on 9 December 2014.

[89] His wife Rebecca, whom he married in Leatherhead, Surrey on 29 May 2010, works as a flight attendant for Virgin Atlantic and he has 3 sons called George, Bertie and Alfred.