I thoroughly enjoyed this solid, well acted and very creepy tale of John 'Reginald Christie. It showed London at it's squalid worst just after World War 2, at least the part where the Christie's lived. London is another grim character in a grim tale. Tim Roth as Christie gaslit his poor wife, who showed only brief flashes of spirit. Well worth seeing.
Solid performances from Morton, Roth, & all, but the work is spoiled by hideous sound effects, especially the slowed-down raspberry one used to convey an ominous feeling.
It's hard to find out how accurate the portrayals are - was Ethel actually complicit in Christie's crimes? Was she racist? Not knowing makes me wonder whether it's valid to attribute faults or virtues to deceased people in order to flesh them out.
Only the BBC drama department can take a fascinating true crime scenario & turn into unwatchable rubbish.