I chanced upon this on the hpcashback website. Until this Sunday (09/10/16), there is £500 cashback on this particular model. It says £200 on the page, but have a look at this on the hpcashback site: https://hpcashback.com/gb/en/pages/premiumcashback/qualifying
I called to verify with HP, who said the £500 cashback was correct! Seems like a fantastic price for a premium laptop. I personally love the styling of the laptop, but don't know enough to say if there is better for £700. Here are some deets:
HP Spectre Pro 13 G1 - Core i5 6200U / 2.3 GHz - Win 10 Pro 64-bit - 8 GB RAM - 256 GB SSD NVM Express (NVMe) - 13.3" 1920 x 1080 ( Full HD ) - HD Graphics 520 - 802.11ac, Bluetooth
Comes with 3 year Next Business Day Onsite warranty from HP.
Quidco 2% for HP I think.