Place a large pan on the hob to heat.
When the pan is hot, tip in the mince and cook until browned. Add the flour to the mince and cook for one minute. Crumble in the Oxo cube and add the onion and carrot. Add the worcestershire sauce, the beef stock, a little salt and pepper and simmer for 30-45 minutes..
Keep an eye on the pan so the mince doesn't get too dry - you might need to add more stock.