I would ask your accountant if they know a good mortgage broker, this is what I did , or if you know any one else in the business who has used a broker recently get a recommendation from them. This is how I did it a few years back. Unfortunately I cant recommend anyone as it was too many years ago. When I did apply, they put my job title as Model, as that is what I was doing at the time.
They wanted 3 years of accounts from me, which my accountant was able to provide.