Place the ham in a large pot and cover with cold water.
Bring to the boil, then drain and discard the water.
Line the base of the air fryer with baking paper and place the ham inside.
Cook on the Bake setting at 160°C for 40 minutes, turning the ham halfway through cooking.
Mix together a quick glaze using honey and English mustard.
Brush the glaze generously over the ham and return to the air fryer for a further 5–6 minutes at the same temperature, until sticky and crispy.
Leave the ham to rest before slicing and serving.
