Touch of Time Antiques has dated this piece to the 1800s.
An identical mould can be found in Michael Berthoud's Compendium of English cups on page 185.

But it’s not just about the mould. Here we have a rare type of painting, where the reserves on the items are not just painted with floral compositions but also include landscape pieces – such painting is more difficult to execute and is much rarer!

Painting of this level was performed at Coalport by Cecil Jones, a very talented artist and a recognized maestro of floral painting. In old Coalport pattern books, some patterns are clearly attributed as his work; unfortunately, the pattern on this trio is lost (pages are missing), but by all indications, it is Jones's work.

Items are marked to the reverse by a pattern number in gold 4/121
Dimensions: teacup, height – 6 cm, diameter at the top – 10.9 cm, hold 200 ml.
Coffee cup, height – 7 cm, diameter at the top – 8.6 cm, holds 185 ml.
Saucer, diameter – 15.5 cm.
Condition: excellent, without any losses and restorations, without glaze crazing, just some slight gilt wear can be noted.
Touch of Time Antiques has dated this piece to the 1800s.
You can view the stock and full dealer information on the Touch of Time Antiques Profile Page