Deposit protection - 1st 6 month AST set up by agent, 2nd by landlord

Tenancy Deposits

I have 2 existing tenants in a property on a letting agents 6 month AST due to run out at end of Jan 13. The tenancy deposit was taken by the agent and protected by them.

The tenants want to extend for a 2nd term of 6 months but I want to do the AST myself. Can I leave the original deposit protected as is?

Thanks