Bypass immobiliser on uk2000 v4

[nathanhand]

I have a v4 Subaru uk2000 and immobiliser is stuck in I originally got it with no key and ecu so bought ecu from eBay and got barrel and key from my mate as I thought it wouldn’t be immobilised now I have engine light flashing continuously and code 53 is the anyway to bypass it so I can get it running because I’m running out of options thanks in advance