The best option is to go to a trusted company formation agency and review their packages and the inclusions in each package. A lot of agencies offer the basic digital package which is often the cheapest and already includes digital certificates and other electronic documents needed for setting up a new company.
This option is perfetct for those whose main objective at the moment is to register a company name that will be used in the future, or for those who want to have their company registered without having to incur a huge cost and would like to process their own paperwork.
Before availing of any digital package, make sure that the company formation agency offers special features like what www.setupacompany.co.uk offers. These include unlimited company support, the inclusion of the £13 Companies House fee, web filing authentication code, and a lot more.