Neville is the complete opposite of his son, Frank. He is a proud, semi-retired, workaholic trade unionist, who looks down on his son for his laziness and drunkenness.
Neville is on better terms with his grandchildren than he is with Frank, as they adored Neville in return, to the point of seemingly competing for his approval. While he seems to behave as a doting father-figure to his grandchildren, there are hints of a domineering and manipulative side of his personality when he guilt trips Fiona into babysitting Sheila's children so that he could go out for dinner with Sheila and Frank.
Neville would also visibly flirt with Sheila, even when Frank was present.
When Frank was growing up, Neville was a verbally abusive and distant parental figure to his son. Frank heavily resented his father but found comfort in his mother Sarah Gallagher who shared his resentment of Neville. Unfortunately, Sarah died on Frank's birthday but Frank was saved from further abuse by his grandmother Nin Gallagher.
In the series
Frank was happy to let Sheila Jackson, his girlfriend at the time, think that his father was dead.
Frank realized his father was near when he caught the odor of tuna sandwiches, which seems to be Neville's signature scent.
When Neville suffers a stroke after berating his son, Frank lashes out by telling him that his deceased mother, Sarah Gallagher, actually despised Neville, due to him cutting her aspirations short by purposefully getting her pregnant.
- John Woodvine has also co-starred alongside David Threlfall in an episode of the BBC documentary-drama Ancient Rome: The Rise and Fall of an Empire. In the episode, David Threlfall played the role of the Emperor Constantine the Great. While John Woodvine plays the role of Constantine's secretray, Lacantius, who is depicted in the show as being responsible for Constantine's conversion to Christianity.
- He did not meet his youngest grandchildren Stella Gallagher and Ben Gallagher.
- He also never met his oldest granddaughter (Monica's half-sister).
- He also never met his great grandchildren Katie Gallagher and Fiona's son.