its very easy for us to do,but if you have no electrical experiance,and i can see you dont,better call a spark in,the red and black are both live,what we call the switch wire,you have what we term loop in loop out to the ceiling light,thats a live and neutral going to rose to rose then back to the consumer unit,with a switch wire going to the switch,its connected from loop in live to the flexie cable,(light)so when you turn switch on,you creat a short so the light comes on.as i said,very easy stuff to a spark,
mm, October 2011