Early years Allen began his management career in the
Winchester City youth system and with
Portsmouth Reserves. He was sacked from the latter role in February 1999.
Reading Allen was appointed assistant manager at hometown club
Reading in January 2000, where he joined
Alan Pardew when the Royals were in the relegation zone. The team produced championship form in their closing 20 fixtures, winning 12 and drawing 4 to secure a top 10 finish. Allen was sacked in November 2001.
Barnet Allen's first full manager role was at Conference side
Barnet, from March 2003 to March 2004. He succeeded
Peter Shreeves, to whom he was assistant manager from March 2002. Allen built a team from scratch in pre-season of the
2003–04 campaign. The team shot straight to the top end of the table, however Allen left for
Brentford with a few weeks of the season remaining in a move that disappointed many Barnet fans. Under the guidance of new manager
Paul Fairclough, the Bees made the play-offs but were beaten in the semi-finals by
Shrewsbury Town.
Brentford team bus at
Victoria Park in 2005. Allen took over from
Wally Downes at
Second Division side Brentford in March 2004. He had a good run at the club, saving them from relegation to the
Third Division in what remained of the
2003–04 season. In the
2004–05 and
2005–06 seasons he took Brentford to the play-offs with fourth and third-place finishes respectively, but they were eliminated by Sheffield Wednesday and
Swansea City respectively in the semi-finals on both occasions. Allen won press attention during the 2004–05 season for the success of his self-described "two bob team", which was composed of ageing pros (
John Salako,
Andy Myers,
Scott Fitzgerald and
Jamie Lawrence),
free transfers (
Deon Burton,
Chris Hargreaves,
Stewart Talbot and
Isaiah Rankin) and young guns who would go on to play in the
Premier League (
Jay Tabb,
Stephen Hunt,
Sam Sodje and
Michael Turner). Allen took Brentford to the fifth round of the
FA Cup in two consecutive years, going out to Premier League sides
Southampton in the 2004–05 season (losing 3–1 in a replay, after a 2–2 draw at
St Mary's) and
Charlton Athletic 3–1 in the 2005–06 season. At Brentford, he proved to be a very popular manager with the fans and an object of curiosity to opponents and media alike due to his unconventional managerial methods, which paid off due to the relative success Brentford had under him on a limited budget. He participated in a 25-mile sponsored bike ride in November 2005 to raise funds for Brentford. With the club struggling in League One in late 2010, there was speculation that Allen would replace
Andy Scott as manager, but the reports were quashed by Brentford chief executive Andrew Mills.
Milton Keynes Dons Allen then dropped down a level to manage League Two team
Milton Keynes Dons for the
2006–07 season, a club with heavy financial backing and ambitions from owner
Pete Winkelman, albeit one that had been in severe decline for the past few years and had dropped from the
Championship to League Two in three seasons. Allen managed to arrest the club's decline and took his team to the play-offs, but lost in the semi-finals to Shrewsbury Town.
Leicester City In May 2007, Allen became the new manager at Championship side
Leicester City, after Leicester and Milton Keynes Dons had negotiated a compensation package. In August 2007, striker
Jimmy Floyd Hasselbaink agreed contract terms with Leicester and chairman
Milan Mandarić invited him to undergo a medical at Leicester. But when Hasselbaink arrived in Leicester on 13 August, Allen told him that the medical was no longer going take place. Six days later, Mandarić confirmed an interest in striker
Derek Riordan, who was lacking first team football at
Celtic. However, Allen refused to make an offer for Riordan, which further aggravated Mandarić. Relations with chairman Milan Mandarić quickly deteriorated and his contract was terminated by mutual consent on 29 August 2007 after just four games in charge. After leaving Leicester, Allen declared his interest in managing
Swindon Town, which eventually went to
Maurice Malpas.
Cheltenham Town Allen was appointed as manager of
Cheltenham Town on 15 September 2008, on a three-year contract. His father,
Dennis, had been manager at
Whaddon Road between 1974 and 1979. With financial difficulties hitting the club and an increasingly troubled dressing room atmosphere, the entire Cheltenham squad were put up for sale. Allen allowed key players to leave mid-season either on loan or for reduced prices, contributing to a run of results which left Cheltenham near the foot of the League Two table. On 20 October 2009 and amidst poor results on the pitch, Allen was suspended by Cheltenham Town and placed on
gardening leave pending an internal investigation into allegations that he racially abused a nightclub
bouncer. In November
Gloucestershire police announced that no action would be taken against Allen concerning the alleged nightclub incident. He remained on leave whilst Cheltenham Town considered his future at the club. On 11 December it was announced he had left the club. In January 2010 he was appointed part-time
scout for Queens Park Rangers.
Return to Barnet On 23 March 2011, Allen returned to his first managerial club, Barnet, until the end of the 2010–11 season. He was working on an eight-game contract but left after only three games, in which Barnet were unbeaten, Notts County won eight points out of the seven games Allen was in charge of at the end of the 2010–11 season, enough for them to avoid relegation. Allen was named League One Manager of the Month in September 2011 after leading the team to four wins and a draw in the league. Allen was sacked by Notts County on 18 February 2012.
Third spell at Barnet Allen was appointed caretaker manager of Barnet on 16 April 2012 for the last three games of the 2011–12 season, replacing
Lawrie Sanchez. Barnet managed two wins under Allen's managership, finished 22nd and avoided relegation from
League Two with a 2–1 win on 5 May 2012 on the last day of the season, against
Burton Albion. Following the end of the season, Allen's contract ended.
Gillingham On 5 July 2012, Allen was appointed manager of
Gillingham signing a two-year contract. His first match as Gillingham manager came on 14 August 2012, a 2–1 away win against
Bristol City in the
League Cup. While at Gillingham, Allen oversaw the
Kent side's best ever start to a league season. He also broke the club record for most away wins in a football league season with a 1–0 win over
Chesterfield, the eleventh of the season on 23 February 2013. On 6 April 2013 Gillingham secured promotion to
League One, Allen's first ever promotion in his career as a manager. They secured the
League Two title with a 2–2 draw against
AFC Wimbledon at
Priestfield on 20 April. On 20 May 2013, Allen was crowned
League 2 Manager of the Year by the
LMA for his achievements with the club. Allen was sacked by Gillingham in October 2013 after sixteen months in charge. Gillingham had won just two games from eleven played on their return to League One.
Fourth spell at Barnet Allen was appointed head coach of Barnet on 19 March 2014 until the end of the 2014–15 season, marking his fourth spell at the club. He coached them to the 2014–15
Football Conference championship on 25 April 2015 to secure promotion to League Two. Barnet comfortably avoided relegation in their first season back in League Two, finishing 15th. However, despite the Bees starting the 2016–17 season just outside the play-off zone in 8th place, Allen made an unexpected request to terminate his contract to join
National League side
Eastleigh. The request was granted on 1 December 2016.
Eastleigh On 1 December 2016, Eastleigh had confirmed that Allen had joined up with them taking the Manager's position previously help by
Ronnie Moore. His first game incharge was in the
FA Cup against
Halifax Town which ended 3–3. This required a replay in which Eastleigh went away to Halifax and won 2–0. For the third round of the FA Cup Allen and Eastleigh were drawn an away match against
Brentford. BBCs
Football Focus interviewed Allen in the lead up to the game and he revealed he almost quit football due to health problems while suffering from stress at Barnet. Eastleigh lost their game against Brentford 5–1. Allen was fired by Eastleigh on 22 February 2017 after only winning two of his 14 games in charge.
Fifth spell at Barnet On 19 March 2018, the departure of
Graham Westley and the return of Allen as manager of
Barnet was announced. On 10 May 2018, it was announced that Allen had left the club, following relegation from the Football League.
Chesterfield Less than a week after leaving Barnet, Allen was appointed manager of
Chesterfield, who themselves had seen relegation from the Football League at the end of the
2017–18 season. Allen was sacked on 27 December 2018, with the club sitting third bottom of the National League table. ==Personal life==