You might get the odd flower at any time of year, Rocky, but don't expect a great display.

No I think you will have to wait til next spring for more flowers.

Mine (which are the native species Primula Vulgaris) only flower in spring/early summer. I've never had them flower in autumn.

Assuming them to be P. vulgaris, it is possible that they will flower come late winter. But spring is the usual.

I had quite a few in my old garden and they seemed to pop up at various times of the year. Once established, they will benefit from dividing every year or so.