From what I can recall, the old Zero wall box wasn't an EVSE as such, so perhaps doesn't comply with IEC 61851, in that it doesn't have a Control Pilot to advertise the max available current to the charger. If my memory is correct, then I think you need an EVSE that can handle the handshake between the car, switch the power on and off, etc.
As suggested above, the Ohme makes sense, as there's a version that will just plug into a 32 A commando outlet. I believe there are also other portable units available with a 32 A commando, like the Tesla UMC and probably one or two others.
Worth remembering that any charge point installation now needs either Type B RCD protection, or Type A RCD protection plus DC tolerant earth leakage protection in the EVSE. Also, if you're on a PME/TN-C-S supply then the charge point must have open PEN fault protection as well. Like DC tolerant earth leakage detection, some EVSEs include open PEN fault detection, but some (including the Ohme) still need this to be provided at the supply end, either by connecting the installation as TT or by adding an open PEN fault protection device.