Your requirements of an IFA will be affected by many different factors including the following:

Your current level of financial knowledge
If your financial knowledge is limited, the knowledge and expertise of your adviser will be a more important requirement than if you were well-versed in financial matters.
                                                               
The degree of involvement you want
If you favour a '²hands on² approach and want to carry out your own investment decisions, you may want help creating an overall plan, whilst making the investment decision yourself.

Alternatively, you might want to completely delegate your financial affairs to a qualified adviser. Or you may want something in between.