He has appeared in many British comedy television shows, such as; Horrible Histories, Sorry, I've Got No Head and Little Miss Jocelyn.
He is also well-known for his numerous similarly offbeat characters in the CBBC live-action series of Horrible Histories, notably including Caligula and the Grim Reaper.
Horrible Histories | Horrible Histories (2009 TV series) | ''Histories'' | Histories | Twenty-Four Histories | Horrible Bosses | Histories (Herodotus) | Dr. Horrible's Sing-Along Blog | Case Histories | This England: The Histories | Horrible Geography | Herodotus' ''Histories'' | Dr. Terrible's House of Horrible | Alexandra Fly based on the Mary Orvis Marbury pattern in ''Favorite Flies and Their Histories |
He is perhaps best known for his regular role in CBBC's Horrible Histories, in which he plays a wide variety of historical figures, most memorably recurring roles as Henry VIII and Alexander the Great.
His interest in history was largely inspired by the popular Horrible Histories series created by children's author Terry Deary, who Longman credits as a major inspiration.
Horrible Geography is a series of books which is a spin-off of the Horrible Histories series written by Anita Ganeri, illustrated by Mike Phillips, and published in the UK by Scholastic.
He also performed Worth the Dog in the Woolworths adverts (again opposite Don Austen as Wooly The Sheep), Mervin J Minky on MTV's Fur TV and Rattus Rattus on the CBBC Horrible Histories series.
He is perhaps best known for his role as a principal cast member, lyricist and writer for the award-winning CBBC programme Horrible Histories, in particular for creating and performing the character of 'Special Correspondent' Bob Hale (a parody of presenter Peter Snow).
Plague, Poverty and Prayer is a Horrible Histories exhibition at the York Archaeological Trust's Barley Hall in York, England.
Robert is portrayed by Jim Howick in the Horrible Histories television series, in a sketch likening him to Ashton Kutcher.
It was co-produced by Sky and Working Title Films, and is co-created, written by and stars the main performers from CBBC's hit series Horrible Histories.
The first programme ever edited in the building at 6 D’Arblay Street was ‘Freestyle’ for the BBC, and a host of other classic children’s programmes followed including: Art Attack, Beat the Boss, Chucklevision, It's a Mystery, Thomas and Friends, Horrible Histories, Ministry Of Curious Stuff and many others.