M-World: Outbreak

Dante Smith is an innocent man, framed for a terrorist outrage he didn't commit. After discovering a secret kept hidden and ruthlessly suppressed for two thousand years - magic is real - he escapes London just hours before the quarantine seals the city.
For those caught up in the chaos, every day is a struggle simply to stay alive, the innocent, trapped between roaming gangs of scavengers and "the touched" - once friends and neighbours but now altered and wielding incredible but deadly powers.
As Government finally abandons the City and retreats behind a massive concrete and steel wall, a seventeen year old boy, and his damaged seven year old sister, begin a perilous journey to a far-away haven.
Along the way they find death, disease, madness and magic, friendship, family and a reawakened destiny for the entire human race.
M-World, Outbreak is the first in a dark fantasy trilogy by K C Morgan nodding at the half glimpsed, secret worlds of Clive Barker, Mary Gentle, Neil Gaiman and Ben Aaronovitch. Worlds where the fantastic and the terrifying, the murderous and the miraculous wait around every corner. Morgan's London is a savage, blasted ruin where small pockets of humanity shine like beacons in the darkness but whether sorcerer, scavenger or survivor - time… is running out.

http://www.amazon.co.uk/M-World-Outbreak-K-C-Morgan-ebook/dp/B00M28OC9I