all sorted! stupid *&%£$ garage nearly cost me a lot of money getting a new ECU!
when i checked behind the ECU holder, there is a cable that should be going to ground. for some reason that was disconnected, so my car couldn't start.
reconnected this cable, fitted the ECU, bought a brand new battery, and its all working fine now.
the guy put down that my car needed a new ECU on the receipt.. so glad i didn't listen to him!
went for a drive, and it all seems well
i'm rather happy!! shame its costing me nearly £200 though.
£150 for the garage to check it and tow it home
£32 for a new battery as mine was dead and wouldn't charge