Took the dogs across Pembrey Burrows yesterday and came across these small puffballs ~ 1-2 cms across. They were firmly attached to the ground on little stalks unlike the b. plumbea. The fbs were pretty washed out but there were still plenty of spores inside. These were brown and spherical, measuring ~ 5um in diameter. They also had tiny tails and were covered in tiny warts which came out rather well in the spore-photo below.
Could it be b.limosa?