NEDude is correct.
The LGW SIN route was supposed to be a proper money maker for their LH fleet. But it looks like the comms between company and flight deck was the reason for the failure. Also the flight SIN LGW was regularly delayed which I am sure added to the list of reasons why the cargo company tore up the contract.
Everybody knows Norwegian can fill up a 787 but that does not mean they are making profit.