Hi Mate
I am currently looking into this casino promo
http://www.jackpotcity.co.uk/a187369It's quite complicated but according to what Ive worked out so far you get £500 free no deposit.
You can transfer any WINNINGS on that into your real account upto £250.
You need to make the minimum depsoit to be able to transfer the winnings to your real account.
The transfer then effectively becomes a bonus and can be withdrawn after the turnover has been met.
Let me look into this further and get back to you when I have tried it! It's look better than a lot of these no deposit bonuses, but not as good as ladbrokes.
BE