You can find discounts on both 13in and 15in models, with the highest discount on the 13in Spectre x360 with 16GB RAM, 1TB storage and a Core i7 processor. This model typically costs £1799 but now gets £300 off, bringing the price to £1499. You get the Active Pen stylus and three years of dedicated technical support with HP's Care Pack too, worth £99. See this deal here.
The 13in Spectre x360 with 8GB RAM and 512GB storage with a Core i7 processor has £200 off at HP's Spring Sale, with the price reduced to £1199 from £1399. This deal includes the Active Pen and three-year Care Pack support as well. Get this deal here.
Also with £200 off is the 15in HP Spectre x360 with 8GB RAM and 512GB storage, which was previously £1599, now £1399 – which means you can pick up a 15in Spectre x360 at the original price of the 13in model with the same specs. Get this deal here.
Finally get £100 off the 13 in Spectre x360 with 8GB RAM and 256GB Storage, which is now reduced to £1099, down from £1199. Check out this deal here.
The top-range 15in Spectre x360 with a 4K display, 16GB RAM and 1TB storage gets a £100 discount as well, which slashes the price to £1799. It also includes the 3 Year Care Pack and Active Pen. See this deal here.