WordPress wont let me upload images over 2500 Pixels for some reason I also tried elementor to try and link the file into WordPress but no luck so I posted the final poster to Pintrest at the full A1 Size.

https://www.pinterest.co.uk/pin/623818985883263818/

Just in case there is a box link as well to the full A1 sized file

https://universityofhull.box.com/s/km4zw8lbd59rczx178hbe7h9w9lqg3t3

This is the smaller size one at 2384×1684 Pixels