This wagon is to a standard British Rail design, one of 8,590 similar vehicles built between 1951 and 1960.  It is very similar in appearance to the 16 ton mineral wagon, apart from the complete absence of doors of any form.  The reason for this is that unloading was accomplished by use of a special apparatus that could completely tip the wagon over (and then right it again!); hence the code name "tippler".

A number of wagons to this design were built specifically for chalk traffic.  This one worked for Castle Cement at their Pitstone Works and was donated by them in 1991.