Over 3 years ago I paid a large deposit to my landlords agent, when I signed an AST. This was protected with DPS a week later. Since then the landlord has issued and I have signed 3 more 12 month AST's.The deposit has never been re-protected and the AST simply states "deposit with DPS".Is my landlord in breach of tenancy deposit regulations?Will they be unable to serve section 21 without refunding the deposit?Can you point me to the relevant extracts from legislation?Thank you for for any help