When entering your postcode during the initial set up, the system will automatically input the space in for you.
Example: For postcode AB1 2CD, just enter AB12CD.
If you make a mistake when entering the postcode you will just need to press the left hand arrow to go back a character.
To input the numbers, keep pressing the key to select the alternate character:
Keep pressing 2 to select A, B, C or 2
Keep pressing 3 to select D, E, F or 3