The new route, replacing the service axed last year by Ryanair, will operate twice each day, except for a single each-way service on Saturday.

This is double the frequency previously offered by the Irish low-cost carrier.

Operated as a public service obligation (PSO) – meaning it is seen as a vital link for industry – bmi regional will receive a UK government grant for operating the route.

Jochen Schnadt, chief commercial officer of Bmi regional, said: “The north-west region of Ireland is undergoing a sustained period of economic growth, and has received significant investment in new jobs and growth projects over the past 12 months.

"It is important for businesses that the region is well connected to the UK capital. Whereas previously business travellers between Derry and London have had to stay overnight in the city, they will now be able to commute there and back in a day.”

Flights begin on May 2 and will go on sale from March 9, with fares starting from £44 one way.