Definitely puffballs HB. Not perfectly formed examples as dense undergrowth has restricted them, however they could still make excellent eating. For firmness when tapping your fingers on the surface they should sound like a tight drum, the higher the note the better.
The only really possible and inedible confusion would be with a plastic football so no worries on the poisonous front. Keep your eyes on the same spot, there could be others growing with any luck..
Breakfast for us today was a slice of PB (found unexpectedly, next to a local football pitch) fried in butter and served on toast, topped with a poached egg.
P.S. if cutting into slices, peel the rubber band of skin off after cutting for a clean-edged disc
Hope you enjoy
CM
