Phil Bale

Hi, I haven't seen this before so apologies if its a duplicate - I'm registered as Self Employed, am using my name as my business name but want some degree of separation between personal and business so am looking at a Business bank account and using a different trading name with a logo. Can I do this via HMRC / .GOV website and if so how? The only name I can see if my own for the Self Assessment. Any help will be much appreciated!