Self-assessment or accountant?

[stixmcvix]

Hi there

I have a second property that I have been rented out on and off since January 2008, though only recently started to make profit. I now realise I need to declare the income as part of my tax return, but should I fill out the self-assessments going back to Jan 08 or speak to an accountant first? If the latter, any London-based recommendations?

Cheers
Vix

[section 44]

There'll be interest on late paid tax and possibly penalties on late returns but it needs to be corrected.