British Gas's programmers don't believe that a surname can be only a single character.
Their customer service agents worked around this by adding a parenthetical note to my record.
The result is hilarious postal mail that tries to reassure me that my surname really is what it is:
EDIT: Well this blew up. FAQ etc. at https://danq.me/it-is-only-q
@dan My name has been breaking badly designed databases since the '70s. And it's not like a space is THAT unusual a character in a name.