Questão jurídica principal
Whether the appeal against the cantonal return decision and detention extension was admissible
Decisão extraída
The Federal Court treated the return decision and the subsequent detention order as challengeable because the appellant faced an irreparable disadvantage while remaining in custody.
Fundamentação extraída
A remittal order in a detention matter is an interim decision; here, the appellant's continued detention made the harm irreparable and rendered further cantonal proceedings a useless formality.