Sarah Thompson and boyfriend Alexander Barrett were found after a search and rescue operation by Spanish authorities.
Steven Wilson, 36, sued the Ministry of Justice (MoJ) after he was struck multiple times with a nine-inch knife by a fellow prisoner.
Kyrees Sullivan, 16, and Harvey Evans, 15, died on the evening of May 22 last year when they crashed on an e-bike in Ely, Cardiff.
The killer, who cannot be identified due to his age, admitted the murder of Tom Ellis and will be aged 30 before he can apply for parole.