Bring a large pot of lightly salted water to a boil and cook the spaghetti according to the package instructions. Drain and set aside, reserving a little of the cooking water.

Meanwhile, heat a large pan over a medium-high heat and cook the bacon pieces for 6-8 minutes until golden-brown. Use a slotted spoon to remove the bacon to a plate lined with kitchen paper, leaving the drippings in the pan.

Turn the heat to medium and add the garlic to the pan, stirring for one minute. Add the milk, cream cheese and butter and stir until smooth.

Stir in the Parmesan and bacon and cook for 3-4 minutes until everything is heated through. Add the spaghetti and stir to coat, adding a splash of the cooking water if needed to loosen the sauce. Serve immediately.