Thesis by publication. Ch. 2-3. 3 published research outputs included. No permissions found for any of the 3 research outputs that suggested the published version is permitted. Papers were removed, and pages inserted with title and link to full-text. Paper which forms Ch. 4. is a submitted version of an article that has not yet been published. Submitted version is permitted according to Sherpa/Romeo: https://v2.sherpa.ac.uk/id/publication/7618 however the Publisher source must be acknowledged with citation, and Must link to publisher version with set statement. As it has not been published yet we are unable to insert link or set statement. Removed to be on the safe side and also to protect the author's publishing prospects. LM 29/07/2022