She became only the second woman to complete the course in the Grand National when guiding Fiddlers Pike into fifth place in the 1994 renewal.
Despite repeated attempts at retirement neither Mrs Henderson nor her stable star are ready to call it a day.
"Provided I get my amateur jockeys' permit through in time, I'll be there on Friday," she said. "It shouldn't be a problem as I've phoned up and checked and they say it's on its way.
"We've not ridden competitively since the spring when we had a couple of hunter chases and point-to-points."