Research an IFA by exploring their fees, qualifications, references, investment approach, and their attitude to risk.
Always check that your adviser has the appropriate qualifications and experience. Preferably seek out an adviser by way of professional or personal recommendation.
Take into account your own objectives too; do you need a full service option including financial planning or do you need light touch advice or even just an annual sense check.
By matching these two, you should get a better feel of the IFA that will best meet your requirements.