Rent to rent advice?

Hello, I have a property which has been let on an AST for a number of years and now looking for a new tenant. I have several rent-to-rent companies interested and am keen to get feedback from learned readers on this forum.

Queries as follows:

1)Presently the property is unencumbered but should I decide to raise the mortgage in the future what are the implications?
2)How can one protect themselves from issues of noise disturbance etc
3)What is the procedure to obtain a personal guarantee from a home-owning guarantor to supplement the company let?
4)Where is a good place to source a good company let agreement?
5)Is this classed as a commercial lease? Would a solicitor be required?
6)What is the process of obtaining back possession if rent is not paid/terms of the agreement are breached?
7)How does it work with utilities and council tax? Will these be the responsibility of the new company let?

Any advice, or suggestions are gratefully received.