Building a block wall advice

[Blakeatron]

New boundary wall - roughly 1m, turn right, 30m, turn right, 5m, turn right and finally another 5m.

Just a wall, not retaining, one side will be timber clad and the other side a mix of smooth render and stone faced.
Nothing will ever be hung/grown/attached to the wall.

Height will be approx 1.8m.

Will be using solid breeze blocks, on their face.

Will it need buttresses? If so how many and what spacing?

[Blakeatron]

Ok, seems that I thought this might be easier than it is going to be!

I am getting a builder in to help, as although I am quite handy with dry stone walling I am very much a beginner at block.

Was just wanting to make sure I was armed with the right info.