Sift the flour and salt in to a large mixing bowl and then add the cubed butter. Mix between your fingers until it resembles bread crumbs.

Add the sugar and briefly rub a little more. Add the egg yolk and water and gently combine. When it has almost all come together empty on to a work surface and knead gently until it comes to a smooth ball.

Wrap in cling film and refrigerate for about 30 minutes.