Facebook people seem to think spain based and evening timings. Will be interesting to see how they fare against the mancehster based morning timings.
I am going to Malaga in a few months though and I'm using Monarch on the way down but on the way back th eonly way I found to get a few hours out of the last day was to go via Brussels on the way back, so there might be a gap in the evening for norwegian to fill. Purely based on my one time anecdotal evidence though.