The offset isn't applied in this scenario. When you position the nozzle in your homing file you are moving the nozzle, not the probe, you'll have to manually adjust the X Y location you are using to account for the new offset.
Thanks all, that's solved, my old marlin based printer would use the offset homing z, this doesn't so when id lined up the probe with bed centre it was 35mm out ( the offset) all adjusted now and seems fine
