So, i know there’s been a lot of issues with the new app recognising this a 2 switches.
I simply deleted it from the new app, re-added it and it showed up as an SSR303(?)
From there i simply changed the device handler to a z-wave dual switch and the app recognised it as two independent switches, which i was able to rename and heating and hot water.
The two work perfectly.
I hope this is of help to some of you here, and it would be good to know if this works universally