Hoping for some help.
I was removing a piece of skirting board which had been used to hold up a shelf in my 121 first floor tenement flat. When pulling it off I found that it had been attached to the wall using wooden wedges that had been wedged between a gap in the red brickwork. The wooden wedge was approximately the size of a door stop wedge. The space now left between the two bricks is approximately 5-6cm.
I was hoping to fill/fix this gap before replastering the wall. Any advice on how to fill or fix the issue?