A "bona fide campus legend" he used the university setting to quickly become a prominent figure in the universities societies based in the arts. He landed principal roles in some of the largest productions of his first year, and became the only chair of PantSoc, the university pantomime society to serve for two consecutive years. He served on the committee of DramaSoc and was also a regular guest on a show on URY, the university's radio station.
Within PantSoc he directed and performed in Peter Pan...tomime, a student pantomime which satirised reality television. The show was a widespread success, attracting record audiences for the society, and with Will giving "the performance of the evening."
William co-founded the Strolling Theatricals in 2006, a small drama company to take shows to the Edinburgh Fringe Festival. It was with this company that William developed his signature Bouncy Castle Experiment, where he edited and performed Shakespeare pieces entirely on a bouncy castle, usually for comic effect. The concept reportedly formed while in Argentina, when Seaward was considering how to stage Waiting for Godot while at a children's party. It proved to be a difficult venue in which to present a Shakespearean play, with difficulties arising from the use of wooden swords, and entrances by the actors proved to be problematic - as Seaward described the problem, "When people enter, the actors already on stage tend to fall over". Nevertheless, he directed Bouncy Castle Hamlet and Bouncy Castle Macbeth in 2006 and 2007 respectively, receiving mixed, but predominantly positive reviews from critics. Bouncy Castle Macbeth was listed among the top 100 best acts to see in Edinburgh. They recently appeared on Britain's Got Talent however, they were not well received. Will is currently and starring in another Bouncy Castle Experiment production, Bouncy Castle Dracula.
William has been compared to Brian Blessed, due to his size and stage presence both physically and vocally. He is also famed for making notoriously bad puns, usually involving mistranslating English words and phrases to a foreign language. A typical example would be:
Control? Why that's Spanish for 'with a troll!'Note: The Spanish word 'con' means 'with' in English.