He had loan spells with a number of Football League clubs, including Leyton Orient, Peterborough United, Bristol City and Watford.

He was released by Millwall at the end of that season, joining Colchester United on a permanent basis where he remained until May 2017, playing 47 games.

[4] Able to play at left-back or the left of midfield, Briggs became a regular in the under-18 side despite still being registered with the under-16s, having put in some impressive performances in his age group.

[5] He made his debut in the 3–1 defeat at the Riverside Stadium on 13 May, replacing Moritz Volz after 77 minutes to become the Premier League's youngest ever player at the age of 16 years and 65 days old.

[7] On 16 January 2010, Briggs signed for League One club Leyton Orient in a one-month loan deal that would run until 13 February.

[8] He made his first professional appearance in two and a half years on 19 January when he played the full 90 minutes in Orient's 2–0 home win over Yeovil Town.

[12] He played in Fulham's 2–1 defeat to Arsenal on 4 December, but was replaced by Chris Baird after just 28 minutes[13] through injury, after which he had an operation on his calf muscles which Mark Hughes hoped Briggs would have fully recovered from in early 2011.

[14] A troublesome ankle injury kept Briggs out of action for longer than expected, but in March 2011, he signed a contract extension to keep him with the club until the summer of 2014.

[23] On his return to Fulham, Briggs was told by Jol that he would have to wait his chance in the first-team owing to the form of regular left-back John Arne Riise.

[26] He started in Fulham's 3–2 defeat to Manchester United in the Premier League on 25 August,[27] before he was loaned to Bristol City for one month on 26 October 2012.

[33] Briggs helped Watford reach the play-offs, where he played in both legs of the 3–2 aggregate win over Leicester City, taking the club to Wembley for the final.

[45] Briggs revealed that his agent had also spoken to Blackburn Rovers and also received a contract offer from Huddersfield Town after spending a few days with the club.

[52] Before making his international debut, Briggs was sent-off for the second time in the 2014–15 season when he received a second yellow card during Colchester's 2–2 away draw with Gillingham on 21 March.

[56] He made his second debut for the club in their 2–2 opening day draw with Blackpool on 8 August, playing 79 minutes before being replaced by Kane Vincent-Young.

[65] He made one appearance, at home to Port Vale, but following the departure of Graham Westley new manager Martin Allen announced that Briggs had departed the club as there was not enough room for him due to the size of the squad.

[71] On 10 September 2020, Briggs returned to Denmark and signed with newly promoted Danish Superliga club Vejle Boldklub after a trial, on a deal until the summer 2022.

[73] On 23 July 2021, Briggs returned to England to join Southern League Premier Division South side Gosport Borough.

[79] Briggs made his debut for the under-19s on 13 October 2008[77] in a 4–1 European Under-19 Championship qualification defeat by Serbia at The Showgrounds in Newry, Northern Ireland.

He was a late addition to the squad, having to fly back from Fulham's pre-season tour of Australia to link up with his teammates in Ukraine.

[77] Ahead of the tournament, Briggs had made a substitute appearance in England's 2–1 elite qualification win over Scotland on 1 June 2009 at Bramall Lane, Sheffield.

Briggs made further appearances for the under-19s in the 2010 elite qualifying round in the 1–0 win over Republic of Ireland in Kyiv on 26 May 2010, and the 1–1 draw with Ukraine in Borodyanka on 31 May 2010.

Briggs played only once in the finals held in France, starting in England's 3–2 win against Austria on 18 July in Flers, Orne.

[77][83] Briggs was called up by the Guyana national team in March 2015 ahead of their friendlies against Saint Lucia and Grenada.

[7] On the 15th of November 2019, Briggs scored his first international goal, tapping in from six yards from an indirect free kick by Kadell Daniel during a CONCACAF Nations League Match.