Mark
I would sow them both late August for a September soaking, in the meantime store them at an ambient temperature, not in a fridge.
The Frit seed is best stored in a paper packet and the Narcissus seeds are best stored in a plastic packet mixed with some dry sand.
Sow the Frit seed on the surface with a covering of grit and sow the Narcissus seeds at a depth of
3-5cms.