(16 Aug 2021, 10:29 am)Train8261 wrote What's the one about the 51A in the Withdrawal section as it says this on details
Cancelled and merged into 458
It's just merging the registration with the 51. The 458 is the registration code for the 51. Must admit I was a bit stumped at first haha.
159 is the X21, 450 is the 308 which are the other 2 (X22 / 306)