RESOLVED - it was the EVAP valve
Car ran faultless with the EVAP hose connection blanked with insulation tape. As soon as I removed the tape it was clear to hear it drawing air.
Changed EVAP fault cleared.
I can now understand that the original EVAP must have been changed at some point, however it was incorrectly fitted, not all the way home, therefore leaking around the o-ring area, and whilst the clip was there to hold it, it wasn’t correctly clipped in.
The replacement EVAP I had ordered mounted correctly, however it was passing air (ordered from AUTODOC ) put the old valve back in and mounted correctly and it not drawing air, so all good. Reconnected hose. And she runs faultless once more