My friends has a flight with Elal SXF - TLV @ 10:00 pm.
He'll be flying into Berlin from London in the morning, spent the day there and then go to Israel.
SXF currently do not have luggage storage facility (per their website).
What's the earliest that he can check in with Elal. If he can check in the morning then he'll fly LON-SXF. If he'll anyway have to schlep his luggage around town, he'll fly LON - TXL.
ETA: There is an Elal flight at 10:55am, so their desk will certainly be open. Will they allow him to check his luggage in in the morning even though he's flying on the evening flight?