Hi James
It depends on your appetite for loss and gain. The relatively small daily average movement is also going to be cut into by the spread.
You may have to put in a fairly largish £ per point to get decent daily rewards (or losses) but if trading with small stakes you can cut your teeth on trading indices with small downside.
If you are going to 'punt' the FTSE you will lose money no matter what you have as a stake but if you research the trade properly then it is a good place to start.
I know people who do trade it successfully. I have had reasonable success with it.
Pete