It could be stated that small company electricity is different in many ways. Smaller business over have smaller budgets for necessary expenses, at least in their initial phases. Unless your business runs completely on solar power, you will need to consider which company will provide you with the energy you need. In the UK there are several options, and the choice will ultimately be up to you.
A small amount of research will go a long way. At a base level you should consider spending a few minutes to see what the current rates are. This can be done by using the free quote feature on provider websites. Quotes do not require you to make a purchase or switch service providers. They are simply offered as information so that consumers can make their own informed decisions as to who they would like to purchase their business energy from.
You can compare small company electricity rates as often as you wish. Many business owners make it a point to do this periodically in order to see if there is money to be save by making a switch. Prices will vary by provider, dependent on many factor. Of course, what will matter to you most will likely not be what these factors are, but what the rate that is offered to you will be.