One thing you also need to consider is this, if you sell the property within 10 years of first letting, all relief granted will be clawed back/withdrawn.
A condition of qualifying for S.23 relief is that the property is let under a qualifying lease for a period of 10 years. So if it was your PPR, it would have ceased qualifying for S.23 relief. Also, if you are selling within the 10 year period, you may face a tax bill.
If you Google "Section 23" you will find the Revenue Guides on S.23
It may be worthwhile consulting a tax advisor as to how you should proceed in order to minmise your tax bill on disposal to your daughter.