One issue I've always had with the Sikth theory is that I don't think Andrew would know who they were. His music tastes are very mainstream in regards to the alternative stuff and the sort of bands you listen to when you first get into that type of music. There's also the question of how would he have bought the ticket? This was the last ever Sikth gig with that lineup and as far as I'm aware it was sold out which rules out buying on the door. He wouldn't have had a card to buy one online or over the phone and his parents would have noticed one being bought on their card. We can also rule out him buying it direct from the box office as it's in London.
I also note that according to Last FM Sikth played Sheffield Corporation less than 2 months before this gig which is 20-25 mins down the road from Andrews house by car or a simple train journey which also ran late enough to come back the same day (Last train back to Doncaster at the time was 11:28PM I believe). I could buy the rest of the theory, I just don't believe he was in London for that Sikth gig.
South Yorkshire police were working on the case and I imagine the local police force in London were also working on it. Not asking for the CCTV was probably just a case of left hand doesn't know what the right one is doing.
I got into this type of music in the mid 2000s...My Chemical Romance, Fall Out boy etc. Slipknot a bit more heavy than those of course.
In the summer of 2006 Sikth were on the bill at a famous UK music festival called Download (playing early on second stage on the Saturday):
downloadfestival.co.uk
Also on the bill is StoneSour fronted by Corey Taylor who also is the singer for Slipknot.
He was likely at the age where he was interested to going to gigs/festivals. I actually went to Download last Saturday and you see much younger kids around than 14 year olds. I think given his Dad didn't automatically rule out that theory meant he was probably pestering them to go.
Maybe he wasn't allowed to go to the Sheffield gig and so rebelled and wanted to go to the final one (although they've since reformed) hence the large cash withdrawal as may well have been touts nearby.
It's interesting as just wearing a t shirt is normally the attire you'd wear going to a gig rather than a large coat and jumper although I'm guessing the weather was still mild mid September.
As I said before on this thread a few years back I've always wondered the role of the relatives actually based in London in this. I imagine it was a few days after when the ticket seller from Donny station came forward and so they realised his destination was London so surely you get the relatives involved as they may have known some areas he liked to frequent on family trips?
I wonder whatever happened to the PSP. That is retro like a Gameboy now so would be a curiosity if it was ever discovered but I presume it's long since been scrapped/destroyed by any potential abductor.
If Andrew decided to end his life then it would've been left somewhere.