He played in the 2005 PDC World Darts Championship debut year, but lost in the last 32 to Andy Hamilton of England.
He was Runner Up in the 2005 Vauxhall Spring Pro, losing to Colin Lloyd of England.
He won the 2009 Malta Open, defeating Roy Brown of England.
He played in the 2010 Winmau World Masters, losing to Ronald L. Briones of the Philippines in the last 64.
Along with Lionel Sams winning the Dutch pairs in 2005 Thomson is married to Allison from Swindon, Wiltshire.