I would assume that as it’s still a relatively new model the facelift may be purely cosmetic. Get a test drive in the current version, I don’t think it will drive any differently to the facelift version.
Again, only my assumption, but I can’t see a facelift version coming onto the scheme any time soon, they will have stock to shift, either built or in production, before the facelift is available.
Edited.
Found this on Fleet News, as suspected cosmetic styling to front end, change in some materials and a Google based info system. Drive system etc. same as before.
https://www.fleetnews.co.uk/news/nissan-qashqai-facelift
Please excuse spelling/typos. Apart from being a clot it turns out I had one on my cerebellum that's now causing various problems!