This is a Woods Ware trio of teacup, saucer and plate, made by Wood & Sons and decorated in their "Balmoral" design, similar to their "Osborne" pattern and various, so-called "Gaudy Welsh" patterns of the time.
The maker's mark dates it between 1917 and 1930 and reads:
We like using non-identical, but similar trios to make up a tea set. They're more interesting to use than a completely matching service and you can always swap over what's in the set.
If you have any questions, just send an email to help@3bcshop.com.