In May 2017, Lewer was selected to run as the new Conservative Party candidate for the
Northampton South parliamentary constituency after the sitting Conservative MP
David Mackintosh stood down. Although not from Northampton, Lewer represented Northamptonshire within his East Midlands region as an MEP. Lewer was subsequently elected Member of Parliament for
Northampton South in the
2017 general election. He won with 46.9% of the vote and a majority of 1,159. Following his election win, he stood down as an MEP and was replaced by former author
Rupert Matthews. In February 2018, following the announcement that
Northamptonshire County Council had brought in a
section 114 notice, putting it in special measures following a crisis in its finances, Lewer was one of seven local MPs who released a statement expressing 'no confidence' in the council's leadership. In August 2018, Lewer broke ranks with the other MPs and said that while mismanagement had fuelled the Northamptonshire crisis, the council was also a victim of underlying financial pressures affecting all local authorities with social care responsibilities. In March 2018, Lewer was criticised by local campaigners over cuts to library services in Northampton. Lewer responded that he had been far from silent on the issue and that he had been a long-standing critic of the leadership of the council. In Parliament, he served on the European Scrutiny Committee and the Housing, Communities and Local Government Committee, during his first mandate. During the meaningful vote period, Lewer voted against the government twice before voting for it a third time when faced with
Theresa May reneging on her commitment to take the UK out of the EU on 29 March 2019. During the subsequent leadership election, Lewer supported
Esther McVey and then
Boris Johnson. At the
2019 general election, Lewer was re-elected with an increased vote share of 51.2% and an increased majority of 4,697. Following the election, Lewer was appointed as Parliamentary Private Secretary (PPS) to the Home Office, having previously served after Boris Johnson was elected as PPS to the Northern Ireland Office, the Wales Office and the Scotland Office. Following an interim report on the connections between
colonialism and properties now in the care of the
National Trust, including links with
historic slavery, Lewer was among the signatories of a letter to
The Telegraph in November 2020 from the "
Common Sense Group" of Conservative Parliamentarians. The letter accused the National Trust of being "coloured by
cultural Marxist dogma, colloquially known as the '
woke agenda'". In December 2020 Lewer was fired from his PPS post for leaking information to the press, after a
canary trap. Lewer denied leaking, but suggested the leak could have come from a member of his staff. Six weeks later, he was re-elected as a Member of the Levelling Up, Housing and Communities Select Committee. In January 2021 Lewer wrote an open letter to the Northamptonshire Chief Constable asking that the Police do not focus on 'soft targets' for Covid fines. In November 2021, as Chair of the All-Party Parliamentary Group on
Motor Neurone Disease, Lewer welcomed the fulfilment of the Group's 'United to End MND' campaign with the Government's commitment of £50 million towards the establishment of a Motor Neurone Disease Research Institute. In December 2021 Lewer backed the campaign to build a monument to commemorate the efforts of the Photographic Reconnaissance Unit, a former pilot of which, George Pritchard, lives in his Northampton South constituency. During the
July 2022 Conservative Party leadership election, Lewer helped form the campaign team of
Kemi Badenoch. In October 2022, Andrew Lewer was elected unopposed to the Education Select Committee. Since his appointment he has questioned Secretary of State Rt Hon Gillian Keegan MP about her lack of support for new grammar schools but supported her defence of not levying VAT on independent school fees. Lewer led a Westminster Hall debate on 10 May 2023 on small and medium sized housebuilders, highlighting the reduction of their number in the last fifteen years. On 21 February 2024, he led a Westminster Hall debate opposing Labour proposals to levy VAT on independent schools, highlighting the risk to special schools in particular. In December 2023 Lewer authored a report for the Centre for Policy Studies "Choices for Children" where he described the benefits of boarding schools for some children in local authority care. He lost his seat in the 2024 General Election to
Mike Reader of the
Labour Party, sharing in the nationwide collapse in the Conservative vote. Reader had a majority of 4,000. ==Post-parliamentary career==