Diplomatic relations — Immunity — Diplomats — Scope of immunity — Whether immunity gives rise to exemption from prosecution or merely constitutes a procedural bar — Circumstances in which envoy may be subject to criminal prosecution upon dismissal from post

Diplomatic relations — Immunity — Waiver — Immunity from criminal jurisdiction — Whether offence committed prior to date of waiver may be subject to prosecution — Whether prosecution in such circumstances violates rules against retroactive criminal laws — Vienna Convention on Diplomatic Relations, 1961, Article 32 — The law of Spain