No use to you at all (neighbour had quail but managed to kill them all) but interested because you're only just down the road, I think! Also, why must they be unfertilised? I've chickens, ducks and geese and the chickens and ducks are still laying, albeit slowing, so you may have more joy with quail around here and across the channel than in most of the UK - I get the impression our season lasts longer than most of the UK.
H