After being available on pre-order for more than a month, Microsoft's Windows 10 running Surface Book is now on sale in the UK starting at £1,299 ($1,871) for the 128GB storage variant powered with Intel Core i5 processor. The 256GB model using Core i5 processor costs £1,599, and you will have to shell out just £200 more if you want to buy the Core i7 powered Surface Book with a similar storage capacity. The tablet with the highest storage option of 512GB costs £2,249.

Meanwhile, Microsoft is also running some special trade up offers where you can save up to £400. The products you can trade in for this offer are Surface Pro 3, Surface 3, Surface Pro 1/2, Surface 2, Surface RT, Apple iPad, MacBook, any Intel Core I Laptop and Samsung Galaxy Tab. Head over to the Microsoft Store to know more about the deals for Surface Book. The Surface Pro 4, which was launched alongside the Surface Book, costs £749 for the lowest storage variant powered with Intel Core m3 processor.

You can make the maximum cash of up to £400 by trading in your Apple MacBook for the Surface Book. But note that your trade-in device must be a maximum of six years old and should meet accepted standards outlined by Microsoft.

Apart from Microsoft Store, a number of third party retailers in the UK are selling the Surface Book, with a marginal difference in price. Amazon has priced the 128GB, Core i5 model at £1,349, whereas John Lewis and Currys are selling the model for around the same price as the Microsoft Store.