Going through Box Sets found The Loch in ITV Collections. Only five of the six episodes available though. Episode 4 missing. Kind of pointless having this box set available if you can't watch them all.
I see nothing has been done about this, it isn't the first time this has happened and I've sadly just done the exact same thing !! Unbelievably I have had to watch on youtube which begs the question why pay £64 a month for VTV ??