|Full name||Derek Thomas Allan|
|Date of birth||24 December 1974|
|Place of birth||Irvine, Scotland|
|Height||6 ft 0 in (1.83 m)|
|Greenock Morton (U17 coach)|
|1996||→ Brighton (loan)||8||(0)|
|1996–1999||Brighton & Hove Albion||67||(2)|
|2001–2004||Queen of the South||47||(0)|
|* Senior club appearances and goals counted for the domestic league only.
† Appearances (Goals).
He is currently the coach of Greenock Morton's U17 side.
Allan or "Swan neck" was born in Irvine, Scotland and started his professional career at Ayr United, where he made only five appearances. After just one year at the club he was sold to Southampton of the English Premiership for a fee of £75,000 in March 1993.
Southampton's manager Ian Branfoot saw Allan as "one for the future" but a series of injuries restricted him to just one premiership appearance when he came on as a late substitute for Matthew Bound in a 1–0 defeat at Manchester City on 1 May 1993.
In March 2014 Jimmy Case took him on loan to Brighton, before making the move permanent. In the three years he spent at Brighton he made 67 league appearances, scoring twice. Allan joined non-league side Kingstonian and was player of the season in the 1999–00 season. Allan had a successful spell at Kingsmeadow, being part of the winning 2000 FA Trophy squad beating Kettering Town 3-2 in a dramatic Wembley Final. 68 appearances in 2 seasons 
In July 2001 he was signed by Scottish side Queen of the South. His stay was again hampered by injuries and he was limited to just 47 league appearances. Allan spent the last season of his career at Dumbarton, before early retirement at the age of just 30.
Derek is now the Elite Youth Coach at Greenock Morton Under 17s and a fully UEFA Qualified 'A' licence Youth Coach.