Does anyone know if you have to go landside with VLM at LCY if you are through ticketed to europe?
Yes you have to disembark at LCY, go landside (there is no transfer facility), back through security, and possibly back onto the same aircraft!
On a recent trip to Brussels I found that IOM check in will only give you a boarding card to LCY. At LCY you have to collect your onward boarding card from the VLM check in desk in the terminal.