Large Thrown Pot with Partially Glazed Bottom.

Beautiful turquoise glaze on this 12" high, nicely shaped pot. Not signed but it has a large circle of glaze underneath and I'm wondering if, as this isn't the norm for studio pots (most pots I've seen have either no glaze below or a complete covering), if the glazed bottom might point to a maker.

That colour one tone glaze you rarely see in modern British studio with its heavy Chinese/Japanese influences. Reminds me of small 20/30's potteries like Upchuch or Saunders Isle of Wight. I wonder if it has some age?

I was thinking it was probably early 20thC rather than something more modern.

The turquoise glaze is almost identical to that used by Burmantofts in the early 1900, such as the piece at the following link.
https://www.antiques-atlas.com/antique/burmantofts_vase/ac058a460