Iceland has, in recent years, become something of a perennial favourite for TV and film productions, from HBO’s “Game Of Thrones” to “Prometheus”, “Interstellar” and “Star Wars: The Force Awakens” to name but a few so its high time its native productions got their share of the limelight, and “Trapped” – the ten part murder mystery – is an excellent place to start. As a winter storm closes in on…