After a pretty long wait, you can finally pre-order the Lumia 950 XL and Lumia 950 in the United Kingdom and Italy. The Lumia 950 XL is available for £529.99 and the Lumia 950 is available for £449.99 in the United Kingdom. And if you live in Italy, you can get the Lumia 950 for €599 and the Lumia 950 XL for €699.
If you want to get the Lumia 950 in the UK, head over to this link and this link to pre-order the Lumia 950 XL in the UK. Additionally, if you live in Italy, you can get the Lumia 950 here and the Lumia 950 XL here.