NO SH*T, HUMPHREY!

http://www.bbc.co.uk/mediacentre/latestnews/2017/new-detective-death-in-paradise

Well, it's certainly not a surprise for the readers and visitors of this little blog...

See:

http://tattard2.blogspot.fr/2017/01/midsomer-murders-series-19-episode-4.html
http://tattard2.blogspot.fr/2017/01/death-in-paradise-series-6-episodes-2-3.html 

[Update]  Danny John-Jules and Ardal O'Hanlon (as the Columboesque new DI) save the laboured first half of the London two-parter.