DutchBird-757:
When carriers apply for slots, they are able to 'hide' the true destination of the planned route if they wish, either by using a generic code for a non-existant airport, or often by filing a misnomer.
The KEF and SOF I believe are beyond the range (non-stop) of the BACF Embraers from LCY (that is, without a very significant payload reduction) and if you can see the full slots data you will also be able to see that, given the departure and return arrival times requested, the aircraft would never be able to make it there and back to these points in the allotted time.
This is just someone at BACF trying to wind us up. Possibly the filing for MUC is similar, to see what LH's reaction would be....I think you will also find that they haven't requested slots at the other end of these routes, which is something of a telltale sign!