Compare your plant to Lysimachia punctata.

Looks like Lysimachia punctata (yellow loosestrife) to me.

Thanks you so much, had a look this is definitely it. Going to try bring a cutting on now that I know what it is ( fingers crossed ).

A cutting from the stem is not likely to be successful but any piece you can get from the base of the plant with a bit of root attached will grow. It spreads easily and is extremely hardy. I am sure your neighbour would give you a little bit. That's all you'll need.

Thanks for advice. Will save a lot of time also.

Thanks for advice. Will save a lot of time also.

an invasive in regional areas ...

but i surely dont know if so in scotland ...

did you find a big grove of it out in the middle of nowhere????

ken

Here is a link that might be useful: link

Ken .... the OP started with 'my neighbour has this growing in his garden ' .....