All number plates look the same for a reason- the colour and size of the plate, and the shape of letters and numbers is set out in DoT regulations. Its done that way so they are easy to read both by human eyes , and by the cameras and computers used in automatic number plate recognition (ANPR) systems.
Driving a car with altered plates - for example with characters modified to spell a word - is illegal, and you can be fined up to £1000 for illegal number plate offences . Here is a run down for current legal requirements for number plates :
Beef Registrations
Watling Farmhouse
Watling Street
Burbage
Hinckley
Leicestershire
LE10 3AR
T: 01455 882885
F: 01455 221174
M: 07836 798888