Register For Self Employment with Irish Passport

I have recently moved to the UK from Ireland. I obtain an Irish Passport. Since living in the UK, I have started working for myself and I am now self employed as a freelancer here. How do I register for self employment here if I don't have a UK passport or UK driving license. I cannot prove my identity online and cant continue the registration process. What should I do? I tried calling directly but have received no answer.

Hi,
 

If you are unable to register as self employment and class 2 national insurance on line, you will need to fill out this online form, print it off and post it to HM Revenue and Customs.  You will need to have a national insurance number before you can fill out this form.  To apply for a National Insurance number phone Jobcentre Plus on 0800 141 2075.  You may be asked to go to an interview to confirm your identity. See : Check how to register for Self Assessment . Thank you.