Do you realise that as the numbers in an odds calculation goes up the probability of that event goes down.
Can you put some numbers onto those odds so I'm sure you are on the right track for I thought you might have it around the wrong way around.
It is a lot easier to pick a child off a street than it would be to get into a home and take her IMO.
You are using the British odds system in the UK we do not.
We are using the European odds system so the odds for the scenario where she was abducted by a stranger in 5A would be equal to Watford winning the Prem leauge this season, around 1000x the money.
The odds for the scenario that she was abducted by a stranger after an accident outside 5A is equal to Liverpool winning the Prem leauge, around 4x the money.
And the explanation for this is quite simple.
No evidence, witnesses or forensics are able to show that any stranger took her from 5A.
On the other hand there's a chain of circumstances where the pieces fit in the puzzle.
According to the witness Fiona Payne was Kate worried that she would wake up so she thought it would be better to left the door unlocked so she could go out to find them.
If we believe the given timeline there was no one around 5A for about 25 minutes between ~20:40-21:05 and exactly during this time of period there was a man who travelled by car along these roads and withheld important information and lied about the time.
He said he travelled home by car at ~20:45 but he did not.
He travelled home by car after 21:00, after he had picked up a service vehicle (van/pick up) and he withheld this information and why did he need a service vehicle AFTER his job was done?
And one more thing,
there was no lock at all on the lower "security" gate that lead directly out onto the dark street.