We will give you a continuous glucose monitor (CGM) which lasts for 2 weeks. It is the FreeStyle Libre, made by Abbott, and most people attach it on the back of the arm. It’s surprisingly comfortable and you barely notice it - you can have showers, baths, swimming pools, etc, without a problem. You can put the sensor on yourself at home. It comes with an applicator which has a needle to pierce the skin but then retracts so all that's left in you is a really small fibre. This doesn't go into your blood, only into your interstitial fluid (fluid around your cells).