Llanfairfach Incident
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The Llanfairfach Incident was a level three incident which was documented in a top secret file from UNIT, dated 17 June 1973. Exactly 30 years later, UNIT made their documents public. The document mentioned Clifford Jones, Brigadier Alistair Gordon Lethbridge-Stewart, Jo Grant and UNIT's mysterious scientific advisor, "Dr John Smith". (HOMEVID: Global Conspiracy?)