OK so I have reset all of the blinds, remotes, repeaters and have proven that as a standalone until all of the IKEA devices are working and the remote controls the blind. I then started to follow the advice here It starts to try to pair and it still shows up as unsupported. The logs showed just as they did in my post above.
The Co-ordinator was sitting right next to the Ikea repeater on a 1.5m lead / distance from the raspberry pi. The repeater shows as online still on the zigbee2MQTT devices page but unsupported. Any ideas what else I can try as I am tearing my hair out.
TIA
lcsneil