But the GWR also needed a shed to replace the former S&B shed , which had easier access to the freight yard which was on the opposite side of the line .
As the major depot of the region , it was constructed as a heavy maintenance repair shop .
The GWR also needed a shed to replace the former S&B shed , which had easier access to the freight yard which was on the opposite side of the line .
As the major depot of the region , it was constructed as a heavy maintenance repair shop .