As no offers of answers here's another possible Judy Flynn was Val and a Secretary in two episodes of DL Trouble and Moods and then she was Lena in FOTSW . If that is disallowed then David Hatton was in a couple of DL episodes one as Ken and he was a drunk in LOTSW in Catching Digby's Donkey
Pearl pipped you to the post earlier on this if you look at the thread, and I'm not allowing any FOTSW entries
But David Hatton is on my list!! Well done Roger too!