I've no experience of this particular one, but my seat of pants feeling is it's a bit early in the year, so leave it alone and wait a bit longer until growth starts on other plants in the garden and see it it comes along then

This is a late flowering type so pruning is normally done now. You cut it back to about 2 foot above ground level. So, I would expect it to be still dormant at the moment.

Thank you both, Grandad gardener and Owdboggy, really appreciate your advice. Best wishes.

Correct it should still be dormant. You could prune it a bit later in Spring, and wait a little for green buds. It's gathering energy at the moment. I have a similar plant in the same state. It should be fine, unless it has rotted at the base which sometimes happens due to drainage. These plants are very resilient!

Prune it back now - Group 3 clematis like this should really be cut down before end of February, but as yours isn't showing any growth, just do it now. I usually take them down to about 8-10 inches, or to any obvious growth buds.

Thanks Legion and Bamboo. I’ll do the pruning now, fingers crossed it’s going to flourish this year! I’ll prune it to the height advised by all, can’t see any buds or green yet...