Try this Chris.
At 80 mins, reduce tempo and passing directness, increase time wasting (max it at 85 mins), be more disciplined, play for set pieces, reduce width to be more compact, play out of def, remove all other stuff on In Possession screen especially pass into spaceand early crosses. Then slow pace down (GK), play lower bloc and stay on feet.
It has stopped me conceding goals especially in the last 10 minutes of games.