The current spacing is allowed as long as your number plates follow the below alpha numerical patterns:

The law states:

You must not alter, rearrange or misrepresent the letters or numbers. Characters must not be moved from one group to the other (e.g. A123 ABC must not be displayed as A123A BC). Offences may result in any or all of the following:

-A fine of up to £1,000
-The registration mark may be WITHDRAWN
-The vehicle may FAIL the MOT test