Naan Bread Recipe

I have never managed to make a naan bread that is very like those in the restaurants in the UK (and those aren't as good as many I had in India). I have tried a variety of recipes so perhaps it is partially the recipe and partially the method (particularly cooking) that is at fault.

This is the recipe I have found to give the best results
If anyone has any helpful advice feel free to share it...

Makes 6 naan
300g White Bread Flour (ie Strong White)
1 tsp dried yeast
1 tsp salt
20 ml milk
1/2 egg (or 1 small egg)
Approx 150ml warm water

Put the flour in a bowl
Add the yeast and salt and mix
Add the egg and milk and mix
Add enough water to get a bread like dough
Knead for 10 mins
Rise for 1 hour or until doubled in size

Break in to 6 pieces and form each in to a ball and put on a tray to rise again
Leave for about 30 mins during which time preheat the oven as hot as it goes
Shape each piece in to the classic teardrop shape and brush with butter
Put on  pizza tray (as many as will fit) and cook for a few minutes until done. Turn half way through.