The completed line was opened on 2 July 2017 by President Emmanuel Macron; it is operated by TGV services provided by the SNCF, France's national railway company.

By this point, it was being reported that the envisioned high speed line had an increased projected total cost of €3.4 billion, and that roughly 90 per cent of the land required for its construction had been already acquired.

[6] The proposed LGV Bretagne-Pays de la Loire was personally highlighted by President Nicolas Sarkozy as one of four grand projects which were to be a recipient of funding under a national economic stimulus package that was issued by his government.

[5] During December 2008, an invitation to tender was issued for what was referred to as 'partnership contract' to construct LGV Bretagne-Pays de la Loire; the first round of bids were submitted by May 2009.

[7] Reportedly, it had won on the basis of five criteria: cost, the financing package's assessed robustness, technical quality and environmental impact of the proposed work, the timetable for construction activity, and the opportunities available to third party small and medium-sized companies.

[7] On 28 July 2011, the 25-year public–private partnership (PPP) contract, valued at €3·3 billion, which covered the construction and maintenance of LGV Bretagne-Pays de la Loire was signed in Paris by RFF President Hubert du Mesniland and Pierre Berger, the Managing Director of Eiffage.

[2] An associated project, which was ultimately not realised, would have required the improvement of the conventional Rennes–Brest and Rennes–Quimper lines via alterations such as the elimination of level crossings and the straightening of sharp curves so that these sections could be facilitate trains moving at the higher speed of 220 km/h (137 mph) If this option had been exercised, the journey time for Paris to Brest and Quimper would have reportedly dropped down to 3 hours.

[citation needed] On 2 July 2017, the LGV Bretagne-Pays de la Loire opened in a ceremony overseen by French President Emmanuel Macron.

[2] As such, LGV Bretagne-Pays de la Loire does not feature any conventional visual line-side signals, this information being communicated to drivers using in-cab screens instead.