Originally Posted by StuMcIlwain

It hasn't been seasonal in the past, but it looks like they aren't flying it this winter. I wonder what they are using the slot for, or more likely, which airline is using it.

They don't usually announce new international flights at the last minute, especially for LHR where slots are very valuable and hard to get, so if the flight is not on the schedule now then it won't be flying.