Storylines
Fenner is initially introduced to the series as a Principal Officer, ranking him above both Senior and Prison Officers. During Neil Grayling's reign as Larkhall's 43rd Governing Governor, Fenner is promoted to Governor of G Wing making him 43rd in a line 0f 42 others. During series four, Fenner finds himself the subject of (unwanted) sexual advances from Grayling; after Fenner succeeds in having Neil fired, he takes over as The 40th Acting Governing Governor of Larkhall, putting him in charge of the entire prison. True to form, Fenner abuses the power granted to him in his new position and uses it to further his own ends, rather than to assist with the rehabilitation of inmates.
His main enemy within Larkhall is Yvonne Atkins. Fenner continually attempts to use his authority to punish Yvonne for various 'rule-breaking', although she is often not at fault. In turn, Yvonne would use the respect she had earned among the inmates to work against Fenner. Eventually, it becomes clear that Yvonne and Fenner couldn't co-exist within Larkhall for much longer and Yvonne arranges for a hitman to dispatch him. Unfortunately for her this was unsuccessful (due to a tip off from officer Colin Hedges) and ultimately, Yvonne and Fenner's long 'contest' of one-upmanship culminates in Fenner locking Yvonne in a disused hanging cell on a redundant wing at the prison. During the first episode of series six, inmate Kris discovers Yvonne's decomposing corpse.
Fenner is murdered in the same hanging cell that Yvonne met her end. He was beginning to feel the effects of a couple of previous assassination attempts from inmates and staff. Julie Saunders poisoned some candles using bleach, Neil Grayling spiked his drink during his farewell party, Tina O'Kane appeared to give him a poisoned cheese straw during that same party, Darlene Cake and Janine Nebeski used a crude blowpipe to fire a poisoned thorn at him. However, none of these methods succeed in their purpose and Fenner clambers to the doorway of the hanging cell, where he is met by Julie Johnston, who plunges an ice dagger into his neck. He dies in front of the hanging cell where he murdered Yvonne.
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