I am not in the habit of telling other posters that they are wrong but
ZAZOO
The whole thing looks like it started in the wheelwell area
Have you read this thread? Skip just seven posts back up on this page and read about the likelihood of a fuel line breaking. [#127 but this is not the only] This fire was given large amounts of fuel very quickly and that indicates that a fuel line was broken sooner in the event, rather than later as a result of fire.
When you read this thread, you will see more than one report that ground staff saw the fuel pooling under the a/c and that it was, in all likelihood, ignited in the tailpipe of the #2 engine. It then followed the river of fuel onto the ground, under the fuselage and up to the port wing. The flight crew were advised of the situation by the ground crew. The wheels and all of the u/c just happened to be in the way. Had the wind or other factors been different, the fuel might have run away to starboard and ignited the neighbour a/c or the run forwards to the terminal.
Once the report is out we shall know for sure but there are already examples in this thread (as in other incident threats) where the CCTV and eye witness reports land up as being at odds with the facts when investigated.