Under Right2Drive’s agreement with you, the not at fault driver, you won’t be liable for the rental costs as long as you are not at fault, you assist them in the recovery of the costs from the at fault party or their insurer, and otherwise act in accordance with the terms and conditions of their agreement.
If they require your assistance in recovering the rental costs, this may include you having to provide documents, witness statements, and in some cases, appearing in court as a witness in proceedings they commence in your name.
You’ll still need to pay for petrol, tolls and infringements as you would in your own car.