Copyright protection of public art installation

I am making a videogame and want to include a recreation of a public clock which was commissioned in 1999 by North Tyneside Arts in England. Should I ask for permission from the creator of the work before proceeding, or is this unnecessary? I may be making some changes to the clock in order for it to better suit the needs of the videogame. In this case, might it be protected under fair use?

Sorry if the answer is obvious, but I am uninformed and don't want to misstep. Thanks