The anticipation......

Clumping up well. If there are several rhizomes all competing for space, it might need dividing. Every 3 years is ideal. Divide at least 6 weeks after flowering and preferably before September, as that's the period they restart making the best roots. Water initially, trying to keep the wet of the necks. Top dress with bone meal to aid good root development.

Thank you, you're such an expert, I'll check it tomorrow.
I wonder if this one will be Holden Clough ? I didn't label as I thought as soon as they flower I'll know from my list, I think last summer has really worked well.

Definitely not Holden Clough, which is a pseudocorus hybrid, loving damp conditions, leaves more strap-like and really gnarly rhizomes. Looks like the same as the last pic.

Exciting.....

My Holden Clough has been flowering for about a week, in the pond margin and on dry land, but I think I'm warmer than you, only had some rain today since 10 days ago?

I'll let you know when it flower. It rained again today here.