buying a relatives house its less than what I owe on my mortage

Morning

Im selling my House I owe £95,250 on it at 5.89% APR this runs out in Dec

We are buying a house for £85,000 and taking the mortgage with me

Do I still have to put a deposit down as it less than what I currently owe ?? im with the halifax

I dont want to put a desposit down because I have more money to do it up

Thanks