Canada last week signed contracts with the UK Government and GEC-Marine VSEL for the lease and support of four submarines in a £254m deal.
The ex-Royal Navy Upholder class subs saw little service and were mothballed at the end of the Cold War.
The diesel-electric craft have been obtained under an innovative ‘lease-to-buy’ deal through which Canada will lease the subs for eight years and have the right to buy them thereafter.
GEC-Marine’s VSEL yard in Barrow-in-Furness signed a separate contract to provide initial spares and train Canadian crews.
A further Canadian contract for engineering and support management is expected to be signed with VSEL soon, the Ministry of Defence said.