Pauline Q of high tar fag fame; Mark's side kick, definitely something to hide; Ellie's husband for all the reasons Reggie already gave - I'm still undecided but reckon these are top 3 suspects. Oh, and the vicar, so that's top 4, in no particular order. Which means, still have no idea! What about Becca Fisher, if there's a 2 hr gap in Mark's alibi then is the same true for her? What's the point of her if she's not a suspect?