I have found a little gem of a veggie place in Mid Wales. Llanidloes is a very small town in mid Wales Powys, which already boasts one lovely little veggie cafe called The Great Oak. Now they have a heavenly small veggie/vegan restaurant too, called Sanctuary Restaurant.
The food is really good, it is not cafe type, more nice restaurant food. We both had delicious vegan meals. Fresh to order, tasty, the meals are mostly vegetarian but most are adaptable to vegan. The menu is a little unclear which needs work, however this place is cute, serves great food, the owners run the place, so they are very knowledgeable and very accommodating. They only have 4 tables and it is located in a crystal shop, this place is well worth a visit. You can take your own wine as they are not licensed.
They are open Wednesday to Saturday, lunch and evening meals. Book if you are going at night and let them know if you are vegan or have any special diet needs, they are happy to modify meals for you. It is great to find a veggie restaurant rather than just a veggie cafe in Wales.