The creators of the 1970s hit are reimagining an older version of her character in a new series called Here Comes The Queen. The ex-EastEnder said she was looking forward to the new challenge.
"My character won't be glamorous because she is a lady of a certain age but she will be smart," explained the actress. "She is Miss Brahms a few years down the line."
She told the Daily Mirror how the series, written by David Croft and also starring Les Dennis, was triggered by her leaving the soap.
"I phoned David last year and said: 'I've resigned from EastEnders, so if you fancy getting your writing hat on again... And a couple of weeks later I got a script through the post with a lovely letter from David. I'm just so excited - it is going to be brilliant."
Richard also revealed she is not missing the hard work of soap life. "I do have a spring in my step again," she explained. "Before Christmas, I got a text from Natalie Cassidy, who plays Sonia. It said: 'We are standing here in the graveyard. It's very cold. We're here all day and it's all your fault!'
"I sent a text back saying: 'I finished work at 11.05am and had a nap. Now I'm out having a drink before lunch. Enjoy your day!'"