I am currently researching the opportunity to open a foreign subsidiary of my software house in the UK. I am interested in a few issues:
You don't need an accountant or a lawyer to start a (Limited Company) business in the UK, as it is trivial, both in time and cost. Of course, accountants and lawyers will both tell you that they are essential, but in my experience (20 years running businesses in the UK), neither add value.
Of course, there may be specific times when you need their services, such as for an acquisition, etc, but for day to day running, they are not necessary.