How you have done it you have left the hole to be a cold spot which is not good you should have fill the hole with expanding foam then scrim tape then skim over it
Is the air brick getting blocked from other side as otherwise that plasterboard should have been moisture board at least or does it not matter? Not having a go by the way just curious
Had a chippy friend some years ago now who I was doing some work for .. I went in on the Monday and found him sitting in the chair with his leg in the air - I asked him WHY! ?? - He said He'd knelt on a nail while laying a floor and the Knee was well inflamed - by Thursday He's DIED!! ☠.... He didn't know it - but He'd developed Sepsis, and because He was otherwise Fit & Healthy He thought It'd Blow Over 🤨 - It didn't .. He was the local Town Swimming Coach and really DID keep himself FIT! - Sepsis is a Silent Killer 💀☠💀 So if We don't get any more Video's after this one - We'll know WHY!! 🤠 ... That was a terrible Bull-Nose - You should've pre-formed it with some of that dodgy bonding and some dirty water 😎
@petemoring67 Thanks your a cheerful chap. I went to the hospital and got it cleaned and covered they put some Steri stripes on you be pleased to know it's healed up nicely