Yes, sorry. Both war films set in Vietnam anyway :)
It was Beckton - the gas works, as seen in the background of the picture. They dynamited parts and painted it up with Vietnamese adverts to make it look like bombed Vietnam.
Some bits of the buildings were still standing a decade ago.
Filming wasn't just at the gas works but along many of the areas. There allegedly were still craters from ww2 bomb damage. But I took that with a pinch of salt.
Full metal jacket not good morning vietnam,
Silvertown more than beckton too.
Is that the flour mill in the background?