Zombies everywhere

Demi Moss ran for her life, the undead were rising all over England. Crawling out of the mud, like horrible little bugs. Gravestones were turning over, cemeteries had become danger zones, as zombie hordes gathered where people once mourned lost loved ones. It was like something out of a classic horror movie, as crippled men and women, with skin running off their bones, came shambling towards the living who fled from them in frantic terror! Whole cities were overrun with these monsters. Demi was in London when a horde of them burst from a diesel train in the underground. She was waiting in the subway to go home, but immediately fled back towards the city as hundreds of undead raced out of the metal carriages, their eyes burned red with a fiery rage unlike anything Demi had ever seen before. It terrified her, she and a hundred others joined a stampede racing upstairs, breaking through the barriers to resurface in Piccadilly Circus, the heart of the city. It was chaos, Demi didn't know where to look, at every turn; there were people killing people and it was almost impossible to tell who was infected or not. If that's what this was, Demi didn't know what was causing the zombie outbreak. It was a strange virus (if it was one) as the undead laughed and grinned, some even chanted; "the return of Lucien at last!" Or "our dark lord has resurrected!" Over and over again. No, this couldn't be a viral infection, it had to be something far darker than even that. She had heard about the return of Big Foot, Moth Man, Loch Ness Monster and then dinosaurs in America. Now there were zombies in England, something foul and menacing was a foot. Demi couldn't think about it at all, she just ran and ran, away from the horror, screaming in frantic terror! There had to be a way out of London, there just had to be. She searched for it endlessly, climbing high above the walking dead, jumping on top of stationary vehicles that had crashed in the outbreak. Smoke rose over the city, buildings were set on fire. Riot police were already storming the streets and alleyways, Demi looked high above the skyline, she saw army planes and helicopters, paratroopers were gliding in to save the day. There were panic bells, it was red alert!
"There's something here from somewhere else!" A soldier yelled, as war machines sprung to life, shooting madly, "call the troops out in a hurry! This is it, boys, this is war!" He cried, as a hundred red and bloody zombies ran by. Demi hid from the gunfire, as these camouflaged superheroes stormed in to shoot the undead down, they weren't just from the sky, but crashing in with battle tanks, squashing the walking corpses like pesky insects. Demi didn't know what she was afraid of more, the marching men with high tech weaponry or the beasts from beyond the grave. She was hiding inside an abandoned building, with other survivors gathering close by, they became a gang of desperate people, eager to escape this living hell. It seemed impossible, so they all hid upstairs, watching from the windows high above, the war on land was neverending. The building collapsed before their feet, a missile crashed into the second floor, it made the walls around them crumble and shake violently. Demi and the others all tried to run back down to ground, but the stairs cracked and split wide open. Demi lost her footing, falling to her death. The last thing she heard was the others screaming, before the back of her head smashed the ground.