Hi, I have a mortgage on my family home and I currently claim my TRS against this. I also helped a friend of mine to purchase a house here in Dublin, but it is not my primary residence and I do not pay any of the mortgage, but my name is against the mortgage. Can I switch my TRS to this as it would be worth more against that mortgage, than my family home mortgage, or would this cause problems for me i.e. is it unlawful?