Sorry but this batch were from Regent tanks. I have given all of the running number and registration details as on the original wagons when photographed.
The wagons you mention were the previous conversion, photographs of two of them at York are here
http://PaulBartlett.zenfolio.com/brcreosotezrv/e16d2c445 http://PaulBartlett.zenfolio.com/brcreosotezrv/e439c016