This is what the Guardian editor said a while back…
“The solution to be entered in the solution form is the word or sequence of letters that is required for entry in the grid. It matters not if hyphens and spaces are included or left out. Nor does upper or lower case lettering matter.
A small selection of potential winners is randomly selected from the file where they are all stored and then the solutions are manually checked until the first correct one emerges.”
Keeping my fingers crossed for you, Prospero, can’t be long now, surely!