Had been looking at this previously and hoping hp might have a deal for Black Friday... they do.
Decent looking 'imac' type desktop PC with touchscreen which has good reviews when i looked recently.
£749 and use voucher code BLACK4 for 100 off. Other deals available in the promo, but not for an all in one.
Windows 10 Home 64
6th Generation Intel® Core™ i5 processor
58.4 cm (23") diagonal Full-HD (1920 x 1080) touchscreen display
8GB RAM and 1TB SATA storage
Wireless keyboard and mouse included