@FrenchPilot @mike2000 is back did either of you know France and the UK once collaborated on an SDV? Think it could happen again, especially as France doesn't currently have a submarine launched version?
MAREX Type-A2
Marex designed a fully enclosed two-man SDV with the pilot and passenger sitting side-by-side with an unobstructed forward view due to a single-piece unframed canopy. This was a very streamlined configuration and allowed an impressive top speed which was faster than military SDVs then in service. The need for forward hydroplanes was eliminated due to a bow thruster mounted literally in the nose.
This design was very modern at the time and intended for both the military and civilian markets. It did not fit the strict requirements of the British SBS or Navy Divers and was not built although.
MAREX Type-A5
The A2 was complemented by he much larger A5 which, as the name implies, could carry five men. Three sat across the front and two in the rear. In the military sense this mean a driver and two swim-pairs. The design was slower but longer ranged than the A2
Comex Total-Sub-01
Just as MAREX gave up on the military SDV market they started working with a French firm who wanted to market their SDVs in the offshore oil industry. At the time many companies were considering this market for wet submersibles to improve the independence and efficiency of technical divers. As it turned out wet submersibles were not well suited to the role and only one A5 derivative was built, named after it's customer 'Total-sub-01'.
*I've been off topic enough, sorry