Vase with both Edgar Campden and Christopher Bayley marks

I have just rescued an Aldermaston vase from its conversion into a lamp (thankfully without drilling a flex hole and fairly reversibly) which seems to have the marks of both Edgar Campden and Christopher Bayley on it. Was that common with Aldermaston pottery that it was two potters work?

It’s uncommon but not impossible. But I’ve not seen an example of Bailey’s Aldermaston mark. It’s possible it’s a glaze code instead. We’d need to see photos to be sure.

You’re right, both their marks. I guess one threw it and the other decorated it