What shall I do ? Get the immobiliser disabled altogether by Avanti for £150 via ECU flash Or Sent the clocks in to autotronics for them to reset the immobiliser and provide a new code for £180
You need to sort the dash. There is no immo solution for the ECU. You can make the ECU ignore the wake up signal from the dash but if the dash is immobilised then that signal won’t be sent.
If you have time on your hands, there is no limit to haw many incorrect codes you can enter, so start entering them. It's 5 digit number, so potentially could go to 99,999 though. Personally, I'd go for the reset at £180, even if just for your insurance. Do you not have any of the previous owner's details? I have all of my imobiliser codes in my phone, just in case. You never know, someone might still have a record of it.