This category is a type of a work visa, but you will be director in your own company and the representative office does not need to apply for a sponsor licence to employ you.
Another advantage is that you will have almost no personal costs, especially if you have been an employee in the parent company and not a co-owner.
Moreover, it is also important that you can bring your spouse and minor children with you. If your children want to go to college after finishing school, they can do so without applying for a student visa because their visas as your dependants on the UK sole representative route can be extended even if they turn 18 in the process.