This is the Wrenn W5031 North Eastern Guards Van in Grey, running number 128105. Only issued by the Wrenn, Basildon factory in Period 3, these are becoming rare to find today. Much harder to find than its W5028 Banana Van counterpart. I am not aware of any variants under this W5031 Box number.  All examples have White Roofs.

Comes complete with P3 (type 7.5p) box and yellow plastic insert.

Condition is "near mint" considering age.