Don't think Blue islands were ever going to be flying into LTN. Believed it was Aurigny Air airlines
Both Aurigny Air Services & Blue applied to operate the route Here's the Blue application,
https://www.gov.gg/CHttpHandler.ashx?id=101713&p=0
& the Aurigny approval
https://www.gov.gg/CHttpHandler.ashx?id=104103&p=0