could these be petrified berries in a rock matrix

Ive never seen any puddingstone here that's anywhere as nice as the stuff the Lord showed us.
What I like to do is to slab it at specific angles along the dip so we can see along the planes of accretion.

Ive seen some in Virginia that is sorta ok.

If they do that, it would appear Hertfordshire is the place. it's just outside London. So far all I can find is that place that sells rocks. they might have one big enough to slice up, but you might have to get that done somewhere else.