Student finance if one parent is living abroad

Hello, I am about to apply for student finance and want to know how will this process go if one parent is living abroad (Germany).

The parents are still married but do not live together. I live with my mom, she is in UK.

I have my dad's financial information, proof of address in his name, and contract of employment. I cannot prove that they do not live together though. Unless dad's proof of address is enough.

What kind of evidence will they ask for?