Ryanair has launched its London winter 2018 schedule, with three new routes from Stansted among its total of 143.

The budget carrier has also increased flights on 15 existing routes.

The new Stansted routes are a three times daily service to Belfast, four-times daily service to Edinburgh and four times weekly service to Nantes.

For winter 2018, Ryanair will have 123 routes from Stansted, carrying 21.6 million passengers per year.

It will also run 15 services from Luton, carrying 1.6m customers per annum and five routes from Gatwick , carrying 1.3m customers a year.

Ryanair vowed to continue to connect London with major business centres such as Berlin, Dublin and Madrid, on a high frequency, but reiterated its stance that it needs more clarity on the UK’s future relationship with the EU after Brexit.

Chief executive Michael O’Leary has been reported to have threatened grounding aircraft after Brexit day and has said he wants to “create an opportunity” by making people realise they are “no longer going to have cheap holidays”.

Ryanair’s chief marketing officer Kenny Jacobs said: “UK customers and visitors can book our winter 2018 seats from next month as fares continue to fall, so there’s never been a better time to book a low fare flight with Ryanair.

“We remain concerned at the uncertainty which surrounds the terms of the UK’s departure from the EU in March ’19. While we continue to campaign for the UK to remain in the EU Open Skies agreement, we caution that should the UK leave, there may not be sufficient time, or goodwill on both sides, to negotiate a timely replacement bilateral which could result in a disruption of flights between the UK and Europe for a period of time from April ’19 onwards, and/or the cancellation of flights and routes, and the movement of our based aircraft to Continental Europe.”