Aren't CCJs specific to the UK? Are you based in Ireland and, if so, NI or the Republic? If it's the latter then I'm pretty sure that the , which most Irish lending insitutions check for credit histories of potential borrowers, does not include information such as UK CCJs. However a lender may ask for such information on application forms in which case you would be strictly obliged to provide it (or else run the risk of jeopardising your application, loan agreement or related insurance policies). Have you inquired (with UB or others) about getting a mortgage and, if so, what sort of response did you get?
No offence but on €80K p.a. how are you finding it necessary to use your overdraft!?