Q.Gazania over winter
I have a very large garden pot which is full of Gazanias from last year. Living in quite a mild climate, I left them in over winter. They have some green leaves, but mostly died off leaves looking like dead grass. I think they will be ok for this year. My question is, do I cut them back to virtually ground level to allow new growth?

You can cut the foliage back to 2 or 3 inches above the ground with pruning shears, which will encourage encourage new growth.
For more information on the care of gazanias, please visit the following link:
https://www.gardeningknowhow.com/ornamental/flowers/gazania/gazania-treasure-flowers.htm