During 1759 the French pressed on with their preparations.
Hundreds of the flat-bottomed transport craft were constructed in Le Havre, Brest, St Malo, Nantes, Morlaix and Lorient.
An estimated 30 million livres was spent on the construction of the boats.
A number of small but well-armed escorts were also constructed.
 By midsummer, more than 325 transports were nearing completion.
 48,000 troops were immediately ready to take part in the invasion.
 Drills were conducted which found the French troops could embark and disembark from the ships in just seven minutes.

Throughout the year, several points of the plan were altered, but it remained the same in essence.
In spite of opposition from within the French cabinet (particularly the war minister Belle-Isle), Choiseul insisted on launching the crossing without fleet support.
The French decided to launch the invasion force entirely from Le Havre, a large harbour some distance from the blockading British fleet at Brest.
A smaller diversionary force would leave from Dunkirk.

In June, French planners agreed that a separate, smaller force would be sent to Scotland to try and gain Jacobite support, and crush British resistance in a pincer movement.
The Duc d'Aiguillon was selected to take command of this force.
Once landing on the Clyde approximately 20,000 Scottish Jacobites, mostly Highland clansmen, would rise and join him.
Command of the larger southern invasion was given to Prince Soubise.
Plans called for Soubise's force to wait for good winds, and then cross the Channel speedily from Le Havre landing in Portsmouth.
During 1759 the French pressed on with their preparations. Hundreds of the flat-bottomed transport craft were constructed in Le Havre, Brest, St Malo, Nantes, Morlaix and Lorient. An estimated 30 million livres was spent on the construction of the boats. A number of small but well-armed escorts were also constructed.  By midsummer, more than 325 transports were nearing completion.  48,000 troops were immediately ready to take part in the invasion.  Drills were conducted which found the French troops could embark and disembark from the ships in just seven minutes.
Throughout the year, several points of the plan were altered, but it remained the same in essence. In spite of opposition from within the French cabinet (particularly the war minister Belle-Isle), Choiseul insisted on launching the crossing without fleet support. The French decided to launch the invasion force entirely from Le Havre, a large harbour some distance from the blockading British fleet at Brest. A smaller diversionary force would leave from Dunkirk.
In June, French planners agreed that a separate, smaller force would be sent to Scotland to try and gain Jacobite support, and crush British resistance in a pincer movement. The Duc d'Aiguillon was selected to take command of this force. Once landing on the Clyde approximately 20,000 Scottish Jacobites, mostly Highland clansmen, would rise and join him. Command of the larger southern invasion was given to Prince Soubise. Plans called for Soubise's force to wait for good winds, and then cross the Channel speedily from Le Havre landing in Portsmouth.
Planned French invasion of Britain (1759)