A great Roy x Jamie fanfic often has well - developed characters. It should stay true to the personalities of Roy and Jamie from the original source. For example, Roy's gruff exterior and Jamie's cocky yet vulnerable side should be accurately portrayed.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of Roy x Jamie fanfics. Just search for the relevant tags and you'll get a bunch of stories to choose from.
There's a chance that Jamie himself could rescue himself. He might be really smart and find a way to outwit Phil Sanfino. Maybe he discovers a weakness in Phil's security or manages to turn Phil's minions against him. This would make Jamie a very strong and independent character in the fanfiction.
Jamie is likely the main character in the story. Since it's his story, he's probably a kid who has some connection to the 'b93 roofsit' which could be an event or a location. But without more details, that's about all we can say.
I'm not sure specifically what the story is as the title is rather unclear. It could be about Jamie's adventure on a rooftop, perhaps a place where kids gather like 'b93' which might be a location or a name related to the area. Without more information, it's hard to say more.
It's hard to say for sure. Sometimes stories like Jamie claim to be true but might have been embellished or adapted to make them more interesting. It depends on the source and the way it's presented.
Jamie Snape is likely a fan - created character in this particular fan fiction. There's not much to go on without reading the story, but perhaps they're related to Severus Snape in some way, like a descendant or a long - lost relative.
Jamie could escape by outsmarting Uncle Phil. For instance, if Uncle Phil has tied him up in a room, Jamie could find a way to untie himself and then create a diversion. He could make it seem like there is a fire or some other emergency, which would cause Uncle Phil to come running and give Jamie the chance to run away.