Norwegian dropping flights from London Gatwick to Singapore

In a surprise announcement, Norwegian is dropping its London Gatwick to Singapore route from 12th January.

This is a blow to their plans to extend their brand of low(er) cost long-haul flying eastwards as well as to the United States.  I am wondering if this is partly due to their on-going Boeing 787 fleet issues, because Singapore is a long flight and ties up an aircraft which could do two New York runs in roughly the same time.

The airline is looking at re-routing options with other airlines, so affected passengers may still get to travel for the price they originally paid.