I got this email today. National Express are partnering with Ouibus instead.
To give our customers greater benefits and convenience, we have decided to withdraw from the Eurolines organisation. Rest assured, you will still be able to enjoy the same amazingly affordable fares to all major European destinations through National Express.
Continue to enjoy all your favourite destinations like Paris, Amsterdam, Brussels and 100s more. All that is changing is when you book online, you book through the National Express website rather than the Eurolines website. Simple!
So, from 11 January 2018 all bookings for European travel will need to be made via nationalexpress.com
If you need to book return travel from Europe before then please visit ouibus.com
We have partnered with Ouibus, one of Europe's biggest coach operators. This means you can now travel to even more destinations across Europe, with many more fast and convenient connections possible than before.