The short answer is yes! A power sourcing service can be set up internally by your management team and tasked with procuring and optimising your business power requirements. Alternatively, you can partner with a power sourcing service like Business Energy UK. But, of course, there are pros and cons to each approach.
There may be lower costs involved in setting up your tendering team internally. But that is not necessarily the case. You will still have to assemble a team of salaried staff who may not be as experienced or knowledgable as a dedicated service. An internal team also takes time to research and assemble.
When you partner with a dedicated power sourcing company, you know you are getting a high-quality service dedicated to large scale tendering. However, you have to weigh up the prices and benefits of working with a dedicated service to see if it's in your company's best interests.