Bowl with possibly AH scratched mark

The mark is very faint and gives the impression that it was added as an afterthought. To me it appears as if there is a long horizontal line, which is used for the central bars of the 2 letters.

HH, HA mark? My first thought was Elspeth Owen

The outside does look like Elspeth's pots but she doesn't use glazes and they a low fired. She also has never marked her work.

The mark could be any of the combinations.

It was bought by the same person that bought the Rowland Hill (I am helping him dispose of pots and paintings via a charity shop) but decades later. He couldn't remember where he bought it but thought it might have been a graduation show or the like.