Identification of Blue Painted Teapot

Hello,

I wonder if anyone could shed any light on the identity and date of this teapot. It always lived in my Grandmother's china cabinet when I was a child - from 1960s onwards -and is now mine. I suspect it dates from mid to early 20th century. It has a brown glazed base and inside similar to Devon pottery. She was born and lived in Devon which would provide a connection.

Thank you to anyone who may shed even the smallest light on this.

is it marked?

The mark is all important. A general Staffordshire mark is not good for value purposes.. Basically because it Staffs pottery was mass produced. hence of little value. In the 1960's Stoke on Trent was still a major producer of pottery.

Thank you both for your time. I'm fairly sure if it had a mark I would have photographed it but I will check.
Are you saying that you think it is Staffordshire then?

The vast majority of British mass produced pottery was produced in Stoke on Trent. Which is defined as Staffordshire pottery. if it is not marked, it is probably Staffs pottery. And make no mistake, in their heyday Staffs pottery production was ENORMOUS.

We always need a base pic, even if unmarked.
I'm betting a turned base, clear glazed on terracotta.
Gibson's and others, made teapots like this,

Possibly Torquay ware ?

I would have said Sadler or Gibson.