I have the dash Eprom if anyone can point me in the correct direction to lose the flashing key symbol please
 I can't open the dash as I'll invalidate my warranty from the new screen

To be able to adapt anything you need switch immobilizer to on in ECU EEPROM first.
It should not matter if your instrument cluster is IMMO2 or IMMO3 as long as your ECU is IMMO2 as IMMO3 clusters are backwards compatible (at least Volkswagen ones ).
Main issue I see is you are trying to pair TT (BAM) ECU with A4 cluster which might just not communicate properly. Perhaps it will work if you use different ECU EEPROM (but be sure to backup yours first) (one from APU or AWT engine) but it may also require to use flash from such ECU and tune it according to your setup.

It does not need to be virgin. It just needs to have immobilizer on.

I give in, It won't let me adapt keys even, on adaptation block 21 it states 2 keys are coded but will not allow me to zero it to wipe them out. Also noticed on measuring block 22 or was it 23? it stated immo status as 6, which i think is adapted/locked?

Can't even get to the ecu adt stage yet.

PPS I have skc's for cluster and ECU

 if i post my adapted to key dash eeprom and my ecu eprom could someone make them match on the ecu eeprom please?

I'd like a working immo if possible as a backup against aftermarket security employed, it seems daft to not use it if possible and i learn by seeing, I have read page after page and sadly cannot get further than keys adapted to cluster to shut light off.

I am now using the virgin immo on file.

cluster  SKC is 7394