shawn byrne
Hi Kate Yes it's fairly easy you may need too put a 4in by 3in plank concrete Lintol in at the height you wish the opening to be also you will need too block the flue too and depending on the internal make up inside you may need too take out more masonry and render or plaster the inside square. So as I said fairly easy for the basic diyer very dirty job though Hope this helps Shawn Slb, brickwork