Dell Outlet has a massive 25% off their XPS 13 9365 2-in-1 laptops at the moment. Voucher code is DOXPS9365. Expires on 16 June (Friday).
That means you can pick up the entry level model (4GB RAM, 128GB SSD, Full HD screen) for £742 (although they keep appearing and disappearing from stock quite quickly).
Stand out deal IMO is the 8GB, 256GB, QHD+ screen option for £842.
All models have constantly changing stock situations so even if they all sell out now there may be some more back in stock before the voucher expires on 16 June.
Brand new these two models are £1,300 and £1,500 respectively.