my water pipes need bleeding and I turned the taps on then the water off and let it?

Well normally to force the air out of the pipes, you would leave the water pressure on and open the highest faucet and let the air bleed out with the water. What you are doing will allow more air to enter back through the open faucet.

Hard to say without seeing it, but I'd guess there's some place where the flow isn't right, and an bubble gets trapped. Also, those kind of noises mean some pipes are not properly secured. Are you tuning on all the faucets and flushing the toilets or running whatever else is on the line AT THE SAME TIME? That's the best way, have everything open and running, then shut each one off, one at a time. If you're turning on the taps but turning the water off, that's backwards. The taps have to be open when you turn the water on, not closed, then close the taps without turning the water off. This should solve the problem temporarily.

What sort of noise is it making?

I'd suspect water hammer before suspecting trapped air bubbles.