She was certainly on a Southern TV (programme called 'How' with Jack Hargreaves and Fred Dineage) late 70s/early 80s.
I have no idea who you've mistaken for her, but Wikipedia doesn't mention her being involved on How (
How (TV series) - Wikipedia, the free encyclopedia. Her first TV appearance was on Countdown in November 1982 - the first programme on Channel 4. She was a junior civil engineer before that.