On a warm Saturday evening in King’s Cross, 30-year-old Alexandre Holroyd is distributing leaflets outside the train station. His campaign literature promises a stronger economy, better security and smart Brexit negotiations. In itself this is not unusual; political parties often target commuter hotspots to grant their pamphlets a wider audience. But Holroyd and the team do not belong to the Conservative Party, nor are they enduring Corbynites. They represent French President Emmanuel Macron’s political start-up: La République En Marche (LREM).

For British politicians seeking to replicate Mr Macron’s middle-ground success, they need look no further than London, where En Marche UK was founded in September 2016 by Ygal El Harrar and the aforementioned Mr Holroyd. The UK branch of Mr Macron’s campaign targets France’s sizeable population here, with 250,000 French citizens living in London alone. They are an eclectic mix of students, blue-collar workers and managerial classes, some new arrivals while others have lived in Britain for decades. Despite these differences, there is one resounding similarity: a majority of them (51.12 per cent) voted for Emmanuel Macron in the first round of the presidential election on the 23 April.

En Marche UK’s good news does not stop there: fully 96 per cent of UK-based French voters backed Macron in the second round of the presidential election two weeks later, with high turnouts in both rounds.

The party's success can partially be attributed to its efficient volunteer-led organisation. With communications through encrypted networks, they successfully planned canvassing operations in French expat hubs like South Kensington and Golders Green, as well as catching potential supporters as they debarked from the Eurostar at St Pancras. Their online campaign was equally smooth: locally-targeted French content with English translations proved popular with French residents and English journos alike. Real life "meetups" and meetings culminated on 21 February in a successful visit from Emmanuel Macron himself, with over 5,000 people in attendance.

After the election of President Macron, En Marche UK is continuing its work for the French parliamentary elections. Mr Holroyd who has been selected by LREM as the parliamentary candidate to represent French citizens in the "Northern Europe" constituency including the UK.

Holroyd is among the 52 per cent of Macron’s candidates who have never been involved in politics before. He declares at his meetings that he was “heartbroken” by Brexit and decided to enter French politics the day after the referendum. While he is clear that his job is not to interfere in British domestic politics, he affirms his commitment to the European project and further integration. His experience working as a regulatory specialist at FTI consulting in London, and previously in Brussels, leads him to support the creation of an EU finance minister and budget.

French Presidential Election Show all 20 1 /20 French Presidential Election French Presidential Election Voters line up to cast their ballots REUTERS French Presidential Election French expats queue along the street outside the Lycee Francais Charles de Gaulle to cast their vote in a polling station inside the school, in the first round of the 2017 French presidential election, in London, Britain April 23, 2017. REUTERS/Luke MacGregor - RTS13JM5 REUTERS French Presidential Election People line up to vote in the first round of 2017 French presidential election at a polling station in Vaulx-en-Velin near Lyon, France, April 23, 2017. REUTERS/Emmanuel Foudrot - RTS13HSP REUTERS French Presidential Election Police patrol polling stations in France REUTERS French Presidential Election Francois Fillon (L), member of the Republicans political party and 2017 French presidential election candidate of the French centre-right, casts his vote in the first round of 2017 French presidential election in Paris, France, April 23, 2017. REUTERS/Christophe Archambault/Pool - RTS13IH0 REUTERS French Presidential Election Benoit Hamon (C), French Socialist party 2017 presidential candidate, is surrounded by photographers as he leaves a polling station after voting in the first round of 2017 French presidential election in Trappes, near Paris, France, April 23, 2017. REUTERS/Vincent Kessler - RTS13I0Y REUTERS French Presidential Election French President Francois Hollande collects voting slips before casting his ballot in the first round of the 2017 French presidential election at a polling station in Tulle, France, on April 23, 2017. REUTERS/Georges Gobet/Pool - RTS13ITO REUTERS French Presidential Election A policeman walks by election posters near a polling station during the first round of 2017 French presidential election in Paris, France, April 23, 2017. REUTERS/Christian Hartmann - RTS13I3A REUTERS French Presidential Election Emmanuel Macron and wife Brigitte Trogneux REUTERS French Presidential Election Emmanuel Macron casts his ballot REUTERS French Presidential Election Emmanuel Macron, head of the political movement En Marche !, or Onwards !, and candidate for the 2017 French presidential election, waves hand during in the first round of 2017 French presidential election at a polling station in Le Touquet, northern France, April 23, 2017. REUTERS/Benoit Tessier - RTS13ICH SAA/ French Presidential Election Jean-Luc Melenchon, candidate of the French far-left Parti de Gauche and candidate for the French 2017 presidential election, leaves a polling booth in the first round of 2017 French presidential election at a polling station in Paris, France, April 23, 2017. REUTERS/Stephane Mahe - RTS13IKB REUTERS French Presidential Election Front National leader Marine Le Pen casts her ballot Marine Le Pen (L), French National Front (FN) political party leader and candidate for French 2017 presidential election, casts her ballot in the first round of 2017 French presidential election at a polling station in Henin-Beaumont, northern France, April 23, 2017. At R, Mayor of Henin-Beaumont Steeve Briois. REUTERS/Charles Platiau - RTS13IEI REUTERS French Presidential Election Early ballots are read as results continue to come in Reuters French Presidential Election Macron supporters react as results come in early in the evening AP French Presidential Election Supporters of Front National leader Marine Le Pen cheer as early results come in Reuters French Presidential Election Alamy Live News. J21KYW Paris, France. 23rd April 2017. Marcon supporters wave French and EU flags after the announcement that he is the leader in the exit polls after the polling stations have been closed. Supporters of Emmanuel Macron, the Presidential candidate from the social liberal political party En Marche! celebrate the exit polls, that see him in first place, ahead of Marine Le Pen from the Front National in the first round of the French Presidential election. Credit: Michael Debets/Alamy Live News This is an Alamy Live News image and may not be part of your current Alamy deal . If you are unsure, please contact our sales team to check. Alamy French Presidential Election Front National leader Marine Le Pen takes to the stage to address her supporters as fans cheer Reuters French Presidential Election Emmanuel Macron greets supporters on Sunday night AP French Presidential Election Emmanuel Macron and wife Brigitte Trogneux celebrate the incoming results EPA

However, this election will be fiercely contested. The incumbent MP is Socialist Axelle Lemaire, a popular former minister in the Hollande government. Moreover, barely a quarter of registered voters made it to the polls in 2015, meaning a lesser number of dedicated supporters could swing it any which way.