To provide dedicated louvre vans for Freight Centre traffic, seven VSX_ vans were reclassed to VSF and stencilled with 'Freight Centre Traffic' lettering in 1978/1979. Some VSX vans had already been stencilled for the traffic.
The Freight Centre concept replaced traffic to each station on a line with one or two main freight stations that received goods. Freight was then transported by road as required.
The VSF vans were a number block of 1036 to 1045.
In the 1979 recoding the vans were relettered to VLEY.
Between 1979 and 1983, a further one hundred and eight vans were converted from VSX_ / VLEX. Most conversions were done 1979/1980.
From 1980 to 1983, the VLEY vans were reclassed back to VLEX or converted to Newsprint traffic as class VLNX.