Can any one recomend a fast growing headg to give me some privicey and how to space it out in the garden

The fastest hedge is Leylandii, planted one metre apart BUT you will have a huge workload in the future to control it.
Better to try privet at half metre spacing, and wait a bit longer, although the leaves drop off in winter.
Beech saplings planted half a metre apart will give a slower but very strong hedge and when the leaves die, they stay on the hedge.
If you can wait several years, box is superb and is the posh person's hedge, at half metre spacing.