She was quite clear (although incorrect) in her 4th May statement;
Concerning the day yesterday, she went to the beach with the children, her son-in-law and her daughter. They arrived there at around 3.45pm and left at around 6.15pm to go to the tennis courts where she stayed until 7pm. The informant then went to the apartment with the small children and ten minutes later, her son-in-law, David, joined them. With her son-in-law's help, they bathed the children.
http://www.mccannpjfiles.co.uk/PJ/DIANE-WEBSTER.htm
That sounds very much like what Fiona said in her rogatory.
Fiona on the 4th says:
"Yesterday they slightly altered their routine, they went to the beach with the children and her mother Dianne. They arrived there around 15H45 and left at 18H15, and headed towards the tennis court until about 19H00. Immediately afterwards, the witness headed towards the apartment with her children, and her mother. Ten minutes later her husband David appeared. In the apartment her mother, helped by her husband David, bathed the children whilst the witness went jogging on the beach until around 20H00. Afterwards, she returned to the apartment and got ready. She left around 20H45, accompanied by David and her mother, in order to meet the rest of the group in the Tapas restaurant."
This is what Dianne says on the 4th May:
"Concerning the day yesterday, she went to the beach with the children, her son-in-law and her daughter. They arrived there at around 3.45pm and left at around 6.15pm to go to the tennis courts where she stayed until 7pm. The informant then went to the apartment with the small children and ten minutes later, her son-in-law, David, joined them. With her son-in-law's help, they bathed the children.
They left the apartment at around 8.45 and accompanied by her son-in-law and her daughter, they went to join the rest of the group at the "TAPAS" restaurant."
That is rather too much similarity really.