Have your daughter get a quote for repairs at a reputable bodyshop and provide it to the other party. If he is happy to pay for the repairs, then all parties are happy as no insurers are involved (this is a Civil claim outside of the road traffic act). If he advises it is more than he can afford, it is a conflict of interest for your daughter to deal directly with the at-fault insurer, Having the "paymaster" of the repair dictate what they want to pay you is a never a good idea, you also have no entitlement to complain to the FOS should things go wrong. Use a "reputable" claims management company or her own insurer, or as a last resort, the at-fault insurer directly.