R v McPhillips [1989] 1 WLR 1200

Court: Court of Appeal (Criminal Division)

Facts: D intended to frustrate a conspiracy plan by warning potential victims before it could be completed.

Held: Conviction quashed. The court found that intending to frustrate the conspiracy was not equivalent to participating in it.

Key Judicial Statement: Lord Justice Stuart-Smith observed, "Intending to thwart a conspiracy does not equate to involvement in it, and thus cannot sustain a conspiracy conviction."