The replacement for the UH1 wiring centre is the UH8-N available here
https://www.heatmisershop.co.uk/heatmiser-uh8-n-8-zone-12v-wiring-centre/
The replacement for the UH1 wiring centre is the UH8-N available here
https://www.heatmisershop.co.uk/heatmiser-uh8-n-8-zone-12v-wiring-centre/