20. Where parental responsibilities and rights relating to a child who is in Great Britain have been transferred from one adoption agency to another by virtue of an order under section 21 of the Act, the agency from which those parental responsibilities and rights are transferred shall provide such information to the agency receiving the parental responsibilities and rights as it may require to enable it to comply with its duty under section 19(2) and (3) of the Act (progress reports to relevant parent).