woodpecker: Perhaps in hindsight OPS should have routed the spare aircraft (and the 747) to GLA/BFS rather than trying to stretch the operation to MAN.
I seem to remember someone doing some amateur but highly entertaining statistics somewhere earlier in this thread about the number of spotters per movement at various airports. Maybe in hindsight, the true mistake was that ops should have kept the aircraft away from the spotter-land that is MAN.