Have you thought about a rising powerchair instead? https://www.mobilityco.co.uk/products/jazzy-air-2-elevating-powerchair-125913861?variant=47412045906206¤cy=GBP&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&gad_source=1&gclid=Cj0KCQjw6auyBhDzARIsALIo6v96C7LF0Ze82uJD7SbusTK-dleqddhDDl8jrNk4gksTLhODtmKY6r4aAoR9EALw_wcB
Many thanks for the suggestion, but I don’t think that would address my wife’s particular issues.