I have an existing garden wall between myself and next door, it's solid and stable enough but there are cracks down the mortar roughly every 2 metres, having peeked over the neighbours side there are no pillars along the length of the wall only at one end (it ties to another wall at the other end.) As it's my responsibility, would it be possible for me to remove the mortar, take out the blocks and tie in a couple of pillars every 2 metres or so?
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