All the more reason to eat them, Pete. The natural frog population is in decline; how better to support it than to breed your own frogs in the back garden? A boon to the froggy population and a tasty free-range snack, too.
The Edible Frog, celebrated in French cuisine (
Pelophylax kl. esculentus) is a different species from those prevalent in Britain (mainly the Common Frog
Rana temporaria) and is not native to the British Isles. I would not welcome seeing it introduced in large numbers, escaping into the wild and possibly displacing our native species. Remember the mink and coypu? And the grey squirrel?
Under controlled conditions, reared in confined areas from which it cannot escape, and
humanely slaughtered for consumption - fine by me if that's what people want - just another form of meat I suppose.
I do not know whether
R. temporaria is palatable to eat, compared with
P. esculentus. I have tried neither.