Saving and investing

So, its about time I started to think about buying my place, its a 2 bed flat and its council, I have been here for 10 years so I have the right to buy option on it. However I need to save for a deposit but the interest these days is laughable

I have been looking at premium bonds, does anyone do these, I know you dont get interest but you do get entered into a proxe draw and all that and you can draw out whenever you like?

Anyone got any tips?

Zx