BritComs : "Mind Your Language" Season 4

"Mind Your Language" Season 4

The fourth and final season of this incredibly popular and funny show remains extremely elusive. I can't seem to find much info about it.

I was curious to know if anyone here has seen it. How was it? How does it compare to the original 3 seasons. Are there any drastic changes from the previous seasons? It was never released on DVD, so any idea where I could get/watch it?

"I'm the dude, playing a dude that's disguised as another dude".