Another ex-Premier customer here and really can't recommend it. I'd shop around for a better account and buy the Avios.
I think if you are self-employed receiving payments directly into your personal account you should be OK providing you can show a decent history. But if you have a company and receive money into a business account and pay yourself from that sporadically with occasional large dividend payoutss they won't (or in my case didn't) like that so much.