I believe that you will find that your vase is pre-war Nazeing. It is known as a Tapering Vase shape no. 2021.
If the vase is the only one I recall being at Fieldings with the HMH attribution, it was actually WMF and not HMH. Identified as such by a number of experienced dealers at the time, despite the provenance of the collection it was from.
PS. Richard if you could send me hi res photos on awhite background, I'd be very grateful. Thanks, Nigel