Mine isn't personalised but its quite cool and quite fitting for Lia, its 02ME, probably better than anything I could have come up with if I had have choosen a personal mark!
Cairo Clydesdale was BBH1 - Big Bear's Horse (or big brown horse). We have this now on Farra. Hardly changed much, just the sex and the age on the forms as they are so alike.
Chancer has LBH1 - Little Bear's Horse - or it could also stand for Little Bars***ed some days.
One letter has grown out and disappeared completely and 2 others have about a 3rd of the original letter or number left (but not enough to see what it was originally) so that leaves just the one letter.....