A search of an Italian lake for the remains of a wartime bomber has proved unsuccessful.
Mrs Storm's father was lost on a wartime Liberator
Anne Storm, from Marlborough, Wilts, whose father, Bob Millar, was one of the aircraft's crew in 1944, travelled to Italy for the operation.
A salvage team tried for two days to locate the wreckage of the missing Liberator bomber in Lake Bolsena.
The plane was one of 13 which took off from Foggia, in southern Italy, to drop supplies to partisans in Genoa.
Six planes did not return from the mission. The wreckage of five aircraft has been found but the sixth has never been traced.
'Degree of frustration'
Speaking from Italy, Ms Storm said: "There was no sign of the Liberator but the whole lake has not yet been searched."
A £50,000 remote-controlled submersible camera, which is being used to scour the depths, got its "umbilical cord" irretrievably snagged and had to be cut free by a navy crew.
The machine was flown out from RAF Lyneham in Wiltshire to assist in the search of Lake Bolsena, 60 miles (95km) north of Rome.
Mrs Storm praised the Navy's efforts but added: "There is a certain degree of frustration because I have been searching for a long time."