I suppose it's only natural that not all shapes and sizes are to be found easily - and Nazeing did make a considerable range of shapes and size many of which I've never seen. The centre, flared rim bucket vase with a Nazeing id by Fieldings, has what appears to be a matching counterpart, in green, in the Timberlake book, so appears no problem with that one plus the 'doughnut' shaped colour spots is typical of some Nazeing pieces.
Shape wise, there are a couple of matching pieces in the book for Fieldings tumbler vase, so that too has likely provenance on its side.
The final, barrel shaped vase with heavy clear round foot, would be the least easily identifiable piece as being Nazeing - though there is a cloudy burgundy vase in the book though I can't see if it has a foot similar to Fieldings barrel vase.
I dare say Nazeing's output of shapes and sizes is greater than we imagine, and within the groups of greens, blues, lilacs and purples, yellows and browns and shades of pink, there is much colour variation to boot.
For me, the feature that appears often and looks to be typical of Nazeing, is the doughnut shaped colour spots, often with pale centres - and this is seen on Roy's vase, so I don't have a problem with Roy's being from Nazeing.
It might be lack of age, lack of rarity, or simply ignorance, but Nazeing seems never to have acquired collector desirability as some other cloudy/bubbly wares - perhaps if we all come back in fifty years the situation might have changed
