I do not have an Aga (its on the ever growing to do when I have cash list) but I think I can buy a "portable" griddle (like a frying pan but thicker) so I assume I would cook it on that on the hob

I have always loved it and now its worse as the Irish chef Paul Rankin has launched his own and its to die for

Thanks guys - by the way the frogs are fine and the strawberries are ripening. Even my late peas are sprouting not bad for my first attempt.
Tip for you - eat lots of salted pistachios and put the shells around the plants - slugs don't like em - yippee