Do you have photos of the whole plant as well?

From those photos of the leaves I'd say there was a Magnesium and Potassium deficiency. It's usually better to get your soil tested to find out what's needed. A general fertiliser won't fix the problem if there's an imbalance of minerals in the soil. Also the pH of soil can affect the uptake of minerals. With a lot of rain Potassium can be leached from the soil quite rapidly so often there is a shortage of it.