Choice of accountant for EEA

Hello Everyone.

I am a non-EU national and have my 5 year family residence card.
Both my wife and I are self employed and will need to organise out self assessment soon.
The application for permanent residence card (I believe its EEA4) says that we would need to show accountant's letter when applying. I've called up the Border Agency recently and was told that the accountant needs to be certified but was not told exactly which certification he/she should hold.

Does anyone have experience with this? And what accountant we should go for? Someone told us that an accountant registered with HMRC would be enough, or should it be Chartered accountant or any other?

Your help will be appreciated with this.

Many thanks.

I'm also keen to hear anyone's view on this...

I've posted a similar question on another forum and had an answer from a person who applied and succeeded being self employed.
Her point of view is that it is more important to show that the self employment is genuine through the years, and the accountant's letter is just a confirmation of this.

The main documents in this case would be business bank statements showing good/believable earnings, invoices, etc. Tax payments.

She said that if people show their bank statements with trivial incomings or income not distributed evenly over time, then there is a problem.

Hope this helps. I'll still probably find an accountant to write a supporting letter for us confirming our earnings.