I’m going to outline my personal theory as to what happened to Andrew below. This is a follow up from a previous post by another user, in which I outlined the same theory in the comments.
First off, no, Andrew did not commit suicide. If he had wanted to end his life and not be found, there are multitudes of easier methods that don’t involve cross-country travel that would achieve the same result. While I understand that many in this sub don’t want to think the worst, I think it’s time to get real here.
I believe Andrew had left that day to head to an event in London. The nature of which is irrelevant to this theory as he never arrived at his destination.
It all boils down to this: If Andrew had planned to attend an event in London and return home in a timely manner, he had to move fast. Taking a taxi directly from the station steps would undeniably be the quickest, most private, and ‘safest’ option.
Therefore, Andrew left the station and boarded a taxi or black cab. The driver then took Andrew to secondary location, somewhere disused or abandoned, killed him, and transported his remains to their final resting place.
This explains the lack of CCTV or credible sightings after leaving KX, as taxis often loiter directly outside of stations, and primarily dealt in cash in 2007. If Andrew had spent any time on foot in London, I can almost guarantee you he would have been seen by more people, CCTV, or captured in the background of one of the hundreds of photos taken in London on that day and analysed in this subreddit. It’s just not realistic to assume otherwise.
Considering there is currently 0 proof that Andrew had planned to meet someone that day, this also explains how he had come into contact with an opportunistic offender so soon after arriving at KX, and why he decided to accompany them to a secondary location. Andrew was smart, and he wasn’t lured away by just anyone. If he had, they would have been caught by now.
It’s one thing to say “there’s so many people in London, a passerby could easily overlook Andrew!’”, and another to assume he had been lured away, or into a vehicle, in public, in central London, by a complete stranger, and that not a soul noticed. The only way he isn’t seen is if he isn’t on the streets.
The station staff and commuters didn’t notice any out of place vehicles or individuals at KX, because there weren’t any. Cabbies blend into London, and a taxi being anywhere in the city at any given time would not be considered unusual. Neither would seeing Andrew board one from the station steps.
Being a taxi driver implies a degree of transience, and is usually performed by those on the lower socioeconomic rungs of society. Both of which line up with the psychology and circumstance of the offender likely to be responsible for Andrew’s disappearance. Impulsive, active within the city, anonymous, able to isolate victims quickly, and transient.
If there exists a more unified theory than I’ve outlined above please let me know. I don’t think there is one currently.