This pretty London-Shape teapot was made of bone china by New Hall of Shelton, Staffordshire around 1825-30. It is about 10-1/2" long.
There are condition issues. The lid, finial, and spout are in excellent condition. The teapot is in fair condition. There are no chips, no crazing, no discoloration and no repairs. There is almost no wear to the gilding. There are 3 hairline cracks to the handle, and a spider crack to the base. There are some spots of enamel loss to the painted decoration. It displays very well.
Note that splashes of white in the photos are reflections.
The book, "A Guide to New Hall Porcelain Patterns" by A. de Saye Hutton was essential to identifying the maker. In the book the teapot shape is illustrated on page 179, plate 181. This pattern, 1822, is illustrated on page 180, plate 183. This pattern has been found with the New Hall concentric mark. This teapot is marked only with the pattern number 1822 hand painted on the base.
A description of the pattern is given on page 51 of the book: "Gold edge and border lines. Broad band comprising large single pink roses, brown twigs with small yellow flowers, green leaves, and blue/green catkins."