Extra long masonary drill bit (Bracknell RG12)

Hi I need to drill through the wall to the outside of my new flat and need a drill bit to help me do that. Ideally 40cm plus long and the thicker the better. Please let me know if you have anything suitable for me to use please. I can collect most weekends to suit or can try to collect in the week depending on our mutual availability. Hope you can help and thanks for reading my request - kind regards Dave Edwards