Diamond fleet list error

[MW]

I'm pretty sure the reg on the following vehicles is slightly incorrect, with them all being BT11 rather than YT11? Fleet numbers are 33002/3/4/5/7/9.

Preston   33002   YT 11 UWG   Mercedes Citaro O530G   WEB62808023122212   Mercedes B42F       
Preston   33003   YT 11 UWH   Mercedes Citaro O530G   WEB62808023122213   Mercedes B42F       
VoR   33004   YT 11 UWJ   Mercedes Citaro O530G   WEB62808023122214   Mercedes B42F       
VoR   33005   YT 11 UWK   Mercedes Citaro O530G   WEB62808023122215   Mercedes B42F       
VoR   33007   YT 11 UWM   Mercedes Citaro O530G   WEB628080231224217   Mercedes B42F       
Preston   33009   YT 11 UWO   Mercedes Citaro O530G   WEB62808023122444   Mercedes B42F       

[broma1k]

Saw Diamond 32213 in Redditch today reg SO65LRK & by elimination as all were seen makes 32212 SO65 LRZ as it carried no fleet number.Also 32219 carried no fleet number.