Why not say Lost Man/ Woman Booker Prize?
“The Sunday Times Oxford Literary Festival has announced a special event to exclusively announce the Lost Man Booker Prize shortlist. The Lost Man Booker is a one-off prize to honour the books which missed out on the opportunity to win the Booker Prize in 1970. In 1971, just two years after it began, the Booker Prize ceased to be awarded retrospectively and became - as it is today - a prize for the best novel of the year of publication. As a result a wealth of fiction published for much of 1970 fell through the net."
From the Guardian :
Lost Man Booker Prize longlist to award best omitted novel of 1970
Their shortlist will be chosen from a long list of 22 books, which would have been eligible and are still in print and generally available today.
Oxford Literary Festival
"The 2010 Sunday Times Oxford Literary Festival from Saturday 20th to Sunday 28th March offers a wonderful range of talks, discussions, debates, readings, Literary Lunches and Dinners in the exceptional and beautiful surroundings of Christ Church and Corpus Christi College – with many major events staged in The Sheldonian Theatre, The Bodleian Library and other prestigious venues."