[3] Her role in the show was that of chief executive officer of the Holby City Hospital Primary Care Trust, making her the only regular character who is not a medic by profession.

[10] Her casting as Jayne follows a trend of Holby City producers towards hiring established British actors – with Gonet joining a series 9 cast alongside former film actress Patsy Kensit as Ward Sister Faye Morton, comedian Adrian Edmondson as Consultant Surgeon Abra Durant and Jesus of Nazareth star Robert Powell as Nursing Consultant Mark Williams.

"[12] Series producer Diana Kyle also addressed this trend in November 2007, when asked: "When you cast an actor, do you actively seek out well-known names – like Jane Asher (Lady Byrne) and Patsy Kensit (Faye) – or will a role simply go to whoever's better suited?".

"[13] Upon announcing the addition to the cast of the new character Jayne, the BBC described her as "a witty and ambitious go-getter who strives relentlessly to achieve her aims",[2] but who "thinks of herself as Solomon.

"[7] In a detailed character summary, it was stated: It was revealed in episode "The Q Word" that prior to arriving at Holby, Jayne worked as a management consultant, and that when asked for help by her own father with his struggling business, she dismissed him from his position and took control of the company herself in a hostile takeover.

[2] During the show's tenth series, her husband John (Benedick Blythe) began an affair with Jayne's colleague Connie Beauchamp (Amanda Mealing).

Series 9 Jayne takes over from Christopher Sutherland as the new chief executive officer of Holby City Hospital's primary care trust in episode "Under the Radar".

[16] She suspends both characters from work pending a tribunal in episode "Temporary Insanity", and goes on to further her growing unpopularity amongst the staff by again turning down Abra and Ric Griffin's renewed proposals for charity operations at night, explaining there will be no room in her budget for at least a year.

Jayne and surgeon Linden Cullen, who is also involved in the Tans case, are able to manipulate the media, and as the twins' surgery draws to a close, secure alternate funding from the British government.

Jayne then found out about Connie and John's affair and a month after decides to ask the board to give the Director of Surgery job to Michael and then she hands her resignation in and leaves Holby City in September.