Just to give you an idea of what flash fiction is, here is an example from Comely Bank Publishing's managing director, Gordon Lawrie:
PRIDE AND PREJUDICE ON THE No36 BUS
On the lower deck of the bus, Roseanne sat reading Pride And Prejudice.
Across the isle, three women discussed fridge contents – fruit, chicken needing to be used, some broccoli.
Behind Roseanne, two men discussed fingernail-clipping and shaving techniques. However, their switch of topics to deodorants was just too much for her.
“Shut the **** up! I’m trying to read!”
As instructed, everyone was immediately silent; fourteen faces turned towards Roseanne unblinkingly. Then the whispering started.
“Who does she think she is?”
“I’ve got a Kindle.”
“I’ve read 50 Shades.”
Roseanne sighed, shut her book, then closed her eyes.