I just want to update you guys about my NI number application, in February I attended an interview at the job center, so they asked for my mariage certificate, proof of adress and the certificate of application, the last thing the interviewer asked me why do you need an Ni number I said because I'm looking for a job and to pay taxes, I showed a job offer and my CV as well but he didn't want to read or take them, he wrote something on the application form, I think the observation he wrote very important for the success of the application.
Also, I told him that employers don't accept workers without NI number, she gave me a letter on my name which clarify to employers that by law they should accept people without NI number if they have the right to work.
Anyways, after 8 weeks I didn't hear from them, I called they said all applications are on hold because of corona virus, and this week finally I received my NI number.
N.B: this is my second application because the first time I applied for the NI number i only had the stamp on my passport ( admitted to the UK under eu regulation 2016) and the EEA residence card ( which the interviewer didn't want to take it) so I got refused, but now with certificate of application I got it.
I hope my experience will be helpful for you guys