The two-month trial of eight Palestine Action supporters has ended with one guilty verdict out of 15 charges.
The defendants are accused of helping to organise an attack on a factory of Israel-linked weapons manufacturer Elbit Systems in Filton, near Bristol.
None of them were at the scene of the raid on August 6 2024, but their plans allegedly included compiling an equipment list, reconnaissance, and purchasing tools and weapons used by others.
On Wednesday, Judge Patrick Field discharged the Old Bailey jury the day after it convicted one of the defendants of criminal damage by a majority of nine to one.
The jury continued to deliberate for 37 hours, but was unable to reach any other verdicts in relation to the remaining 14 charges.
The identity of the defendant who was convicted cannot be reported for legal reasons.
The Old Bailey trial was opened on June 22 and Judge Patrick Field first sent the jury out on August 6.
The prosecution will now consider whether to seek a retrial, with the case being listed for a mention hearing on September 14.
The defendants are: William Plastow, 35, of Manchester; Teuta Hoxha, 30, of Southwark, south-east London; Hannah Davidson, 53, and Madeleine Norman, 31, both from Edinburgh; Ian Sanders, 47, of Leamington Spa, Warwickshire; Aleksandra Herbich, 42, of Brent, north-west London; Sean Middlebrough, 34, of Liverpool; and Julija Brigadirova, 34, from Chorlton, Manchester.
They are charged with criminal damage, with all but Plastow also accused of violent disorder.
They deny wrongdoing.
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