The conclusion with G-HHUN was that the engine was destroyed by the inadvertant operation of the HP fuel pump isolation switch (when the pilot was reaching for the "smoke on" switch). It's burned into my memory because I was at DUnsfold on the day, helping with preparations for the the next day's Families Day. Whilst the report includes some commentary about potential issues with the bleed valve control unit I'm fairly sure I remember the conclusion was that this would have no discernible effect on the power delivery unless it progressed to a full surge (compressor stall).
There was nothing to indicate a surge or similar event in the case of the SHoreham aircraft was there?