I had seen the story about the three notes (and about empty paracetemol packets and vodka bottles), but had discounted them as uncorroborated, not appearing in any other reliable (ie MSM) source and (if the paracetemol and vodka existed) not having a proven link to Ruth - Box Hill is used by lots of people. If the story was confirmed it would be significant. The fact that a trained journalist and ex-policeman did not have the sources to corroborate it makes it doubtful to me.
I was interested in the new witness who thought they saw her walking on the Reigate road with a suitcase. It would be very important to try to get a fix on the date and time of that possible sighting, the location on the Reigate road, and the direction she was walking. Why? If the sighting is of her (and took place before her disappearance) it may suggest she had stashed the case somewhere to be picked up later (at a friends or somewhere near where she was dropped). If the sighting was after her disappearance it may indicate where she was heading (back home, or to Dorking station possibly, since she took the taxi from there, suggesting she had some other reason for having gone to the station). If she was heading home it reintroduces the random predator possibility (but this still seems unlikely). If she was heading toward Reigate and away from Betchworth I have no idea what she may have been doing. Reigate is several miles down that road (unlike back to Dorking) and there is nothing much on the way.
I agree that if she fell foul of anyone other than a random attacker it would have been someone she knew as social media did not exist. However, the coincidence of meeting a sociopath at precisely the same time as she learns of her family tragedy and decides to leave, seems a stretch. And I am sure the police must have ruled out the obvious first ports of call (family, boyfriend, school friends, village acquaintances). I would also assume, if this were a planned abduction and murder, that such an individual would have offended more than once. But the only other similar offence against a youngster in the immediate area (of which I am aware) was the murder of a schoolboy in 1968, which led to a conviction in 1999 of someone who was living over 100 miles away when Ruth went missing.
Putting to one side the issue of possible local suspects, it seems to me that the key questions now are;
* What are the details of the new possible sighting
* What was she doing at Dorking Rail Station before she got the taxi (as I have said before, that is not the obvious place to get a taxi from Dorking, being out of the town).
* Did she have a passport? I am sure the police know this as they could have asked the passport office. If she did not I am surprised since it is common practice in the UK for secondary schools to organise overseas trips (my daughters cost me a fortune, including the Lake Tahoe ski trip which she spent entirely in shopping malls!).
* How reliable are the sightings of Ruth over the 2 years after she disappeared? I believe her parents identified her from the shop tape, but that may have been hope. If those sightings are reliable it again points in only one direction.
* Did she have money and, if so, how much? I know that my daughter, who worked at weekends in a shop 10 miles from Dorking,when she was 16, could have saved £2-3000 without me knowing. And that was only 10 years ago.
ps: Ruth's birth mother was Nesta Landeg (an unusual name, focused in Wales). She married Ian Wilson in 1976 in Wales and I thought she was an only child (and her parents, Ruth's grandparents) died before Ruth went missing. However, a family tree on Ancestry suggests Nesta had a sibling, so it is possible Ruth has an uncle or aunt (and cousins) alive from her birth mother. Unfortunately details on Ancestry are private as they are still alive.