Buy to let advice - funds for deposit

Hi, just looking for some advice on buy to let mortgages, I will explain my current situation... I have a repayment mortgage on a house I live in, mortgage is approx £50k and current value of house approx £120k, I also have another house which I own outright & currently rent out, approx house value £130k.

I am interested in possibly buying another property to let out but have not funds as a deposit for a buy to let mortgage, could I release funds from either of my two properties to cover the deposit of another property???

Any help or advice gratefully received!

Thanks