"...........it would appear that the proposed GCI 195 has been torpedoed due to the inadequate load-bearing capability of the runway............"
That may well explain why the JER based 195 does JER-LGW-IOM-LGW-JER, while an IOM based Q400 does IOM-LGW-JER-GCI-LGW, each Saturday of the winter schedules. It's not about bringing the 195 to the IOM, rather keeping it away from GCI !