Help Identifying Plant Please

in Plants
Hi, does anyone know what this is in photo with the berries? Advice on when and how to take cuttings - can they be done now and replanted outside immediately?
Also - advice on any fast easy growing flowering ground cover, which grows to a couple of feet high and comes back year after year and can rapidly fill spaces (low maintenance) and survive harsh winters! (clay soil).
Thanks
Also - advice on any fast easy growing flowering ground cover, which grows to a couple of feet high and comes back year after year and can rapidly fill spaces (low maintenance) and survive harsh winters! (clay soil).

Thanks
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I have a different sort of hypericum bush which I find more attractive, and annoyingly, it doesn’t seem to spread at all.
Here's the one I inherited in my current garden, I cut it hard back to refresh it about 5 years ago and have been waiting for flowering to be over before giving it another trim - mainly practical as I can't reach the hedge behind it and need to get in and remove some brambles (you can see one making a break for it!). The chair is for scale.