The Karcher T10 1 Advance Professional Vacuum Cleaner is December 14th's "advent" special deal i.e. it is available at this price today only. It gets a 9.3 average score on Reevoo across 16 reviews.
Just £73.19 including free delivery. Other stores have this anywhere from £85-£100+.
Also worth noting: cashback may be available via TopCashback.co.uk on this item at 8.92% (not 100% sure, but worth trying)