Legal Research for Starter Company

We intend to set up a ventilation and kitchen deep cleaning company.
We are going to deal with:
* restaurant ventilation installation
* ventilation cleaning
* ventilation maintenance
* canopy installation, cleaning, maintenance
* kitchen deep cleaning

Since we are not familiar with the UK regulations and law in this case we really need someone's help in the beginning.
Ideally you will be able to help us in the following sections:
- insurances we need to have
- qualifications/courses/regulations we need to pass in order to hand out certifications to our clients
- permissions we need to obtain in order to work properly and legally
- health and safety regulations
- everything else what would be necessary to work in the most legal way possible

Please contact us if you can measure up to the tasks and ready to help us.
Thank you!