I have recently noticed a crack running down to the right at 45 degrees through the mortar line of the front wall of my house, where the mortar appears to have moved away from the right face of all the bricks involved. The crack is around 2mm and zig zags its way across the brick work mortar for about a one and a half metres. It starts in the middle of the wall. The house is around 40 years old. The front of the house was repointed about 6 years ago but this seems to have happened over the last winter, but I cant be 100% sure. It doesnt seem to be getting any worse but I havent measured it. Does this sound like a simple chase out and repoint job or something more sinister? Can anyone help? Cheers.