Preheat oven to 400F
Cook bacon, discard fat (actually save the fat for future use, it's awesome with Roasted Potato!), cut into small pieces and let cool.
In a stand mixer, mix flour, baking powder, sugar, salt
Cut butter into flour mixture till the mixture is crumbly (do not over mix)
Add bacon bits, spring onion and cheese into the flour mixture.
Gradually pour in half and half (reserve some for brushing the top) until the no more loose flour mixture
Divide dough in half, pat dough into a 3/4 inch thick disc, about 6 inch in diameter. Place dough on baking sheet lined with silicon mat. Use bench scraper, cut the disc into 8 wedges, and slightly separate the pieces. Brush top with cream or half and half. Do the same for the other half of the dough
Bake for 22-25 minutes until the top is golden brown and toothpick test is clean.
Let cool down on the baking sheet. Serve warm or at room temperature.
After it's cut into wedges, dough can be frozen for future use. It will need 5-10 minutes extra baking time.