WW2 British Army long-hose Gas Mask Set.
This is the rarer Long Hose model issued to Drivers etc and anyone who needed to move about when wearing the mask. It also has a black rubber hose rather than the more common canvas covered one.
The mask, head straps and filter are 1941 dated and the bag is dated 1943.
There is also a British Army dog tag attached in the name of M.Riggs.