Fruity vase with ·AT· impressed maker's mark - ireland?

This vase is 17cm tall, has an all-round fruit design, and a clear maker's impressed in the base - an oval with ·AT· (see last photo). I've not been able to identify AT, so any help would be most welcome. (The shape of this vase is rather better than the photograph suggests - my camera seems to distort pots)
Thanks
Terry

I’ve not found it in the Marks book; not one I’ve come across before.

I’ve seen some very similar fruity jugs and bowls by a British potter but I can’t remember her name - and I can’t find her stuff online now. I’ll keep looking as it might be the same potter.

There’s Daphne Carnegy, but as far as I know she’s only used a written DC mark. And Honor Hussey who has an HH mark

I've added Ireland to the title so I can find it again becuase I came across an irish vase with apples recently but lost it again

I've added Ireland to the title so I can find it again becuase I came across an irish vase with apples recently but lost it again