Starts with a P?

I love the teeny tiny white flowers on this plant.
I’ve forgotten the name of it but think it starts with a P, it grows long, red stems and it has pretty pointy variegated leaves…any ideas?

Lots of work on removing the raised bed today , involved two trips to the tip.
The soil is so good it’s sad to see it go. I’ve been around the garden and topped up every container to the brim.
For the first time l’ve hit ground level so that is good.
What is not good is that the wood on the remaining raised bed is worse than l thought and l’m going to have to dismantle that one too.
Was hoping to leave that to next year but hey ho.

Having a bit of a rest now as l’m off to evening Zumba tonight.
Doing this till l can sort out my ballet sessions which are hard to book at the moment as class sizes are dramatically reduced for obvious reasons.

Update :- found the original plant label it’s called Persicaria, Red Dragon.