de la Tour has appeared in films Plenty, Notting Hill, the Roman Polanski's Oliver Twist, 44 Inch Chest, and The Confessions, and in television The Young Ones, Filthy Rich & Catflap, Bottom, Kavanagh QC and The Brief.
On stage, he has appeared at the National Theatre in Harold Pinter's No Man's Land in 2001 and Alan Bennett's People in 2012.
His credits as a television writer include Boon, Lovejoy, Peak Practice, The Vet, Kavanagh QC and Clem.
[4] He appeared as George Porter in episode 13 of series 31 of Casualty "Not in Holby Anymore" and as General Hurst Romodi in Rogue One: A Star Wars Story.
On 27 January 2019, he signed an open letter in The Guardian expressing opposition to the USA's handling of the political situation in Venezuela and calling for more dialogue with the president, Nicolás Maduro.