So since they have been named I assume I can talk about some of what we know so far....
LH has liked at least 4 of kayleighs public FB pictures however I'm yet to see her name on his friends list, I think some1 mentioned they are friends. What is a 27 year old liking a 15 year olds selfie picture for, it's creepy to say the least. Kyle (Kayleigh's brother) has a few mutual friends on FB with LH and Kyle wrote on his FB over the weekend that he needed to speak with LH. There's coincidences and then there's just too many IMO....
I would assume it was therefore LH she was talking to and had arranged to meet up with, seen as we can't find any connection to SB to Kayleigh, although I may be wrong.
I just wonder if the reason SB Is involved is to do with his van?
I don't know but that's my take on it so far.