The LSI vs SCS battle was all over costs. LSI (HIAL) wouldn't offer the IAC a decent rate when the Shell contract ended. The IAC made big savings moving to SCS despite the runway extension and new Terminal bldg. It's only in the last few years that HIAL seem to have seen the error of their ways and get serious about trying to tempt the IAC back to LSI.
Going to be interesting where this ends up - A318's
p.s. I thought Brymon were swallowed up by BA? certainly remember some sort of BA flag on the Dash 7's before they left - Dash 7's were quite something, damn near VTOL.