A collectors dream!!
The mark says poole england and the glaze code is C50 which is pink and seagull.
circa 1950, there are a few things about this that set in apart from the rest, the pottery is much more delicate than similar later sets, but also the tab finial on top of the pot.
there is a crack on the underside of the teapot, but it does not leak, see detail photo.
happy bidding and pls see my other listings as i have more like this listed.

thanks