Maybe 'Little Galaxy'? Looks like it could use some washed seaweed and fish meal, too.

how tall is it? there are many varieties now. I have a couple of dark ones Blue Peter is one but is only about 12-18" tall.

Google Steven Hickman agapanthus, he sells many different varieties and may have an image you can check against.

I saw these in a garden centre and it gave me an idea To plant up and area I’ve been struggling with. Thank you Seaburngirl, will google Steve. 👍🏻