Jillian Wendy Mortimer (née Sowerby; born 20 March 1965) is a British Conservative Party politician, who as Member of Parliament (MP) represented Hartlepool from 2021 to 2024.

[5] Before entering the House of Commons, Mortimer was a farmer in Knayton, North Yorkshire, hand-rearing Dexter cows and selling the beef and lamb from the gate of the farm and also training to become a barrister.

[13][14] At the 2019 general election, Mortimer stood as the Conservative candidate in Leeds East, coming second with 35.7% of the vote behind the incumbent Labour MP Richard Burgon.

[15] Confirmed as the Conservative prospective parliamentary candidate for Hartlepool on 26 March 2021, in advance of the subsequent by-election, following the resignation of Mike Hill, Labour MP,[10] Mortimer won the by-election describing her priorities for Hartlepool as: "recovering from the pandemic, regenerating our high streets and local communities, unlocking the opportunities of Brexit to help create good quality sustainable jobs, helping businesses deliver more apprenticeships and recruiting more police officers.

[17] Dame Amanda Milling, co-chairman of the Conservative Party, tweeted that Rayner had made an "eye-popping error" by "trying to slur" Mortimer because Killick had been working for the Cayman Islands Monetary Authority, the primary financial services regulator for the British Overseas Territory.