Today the European Parliament voted in favour of progressing Brexit negotiations to phase two.
Welsh MEP Derek Vaughan said he accepts progress made but there is still a lot of work to be done.
"This preliminary deal leaves many details and questions unresolved, for example on how citizens' rights are to be enforced, whether their rights are protected if they move to another member state after the withdrawal date or their ability to work cross-border in the EU.
"It is also unclear how the UK with resolve the issue of a border with Northern Ireland. At present the UK has committed to an open border but also says the UK is leaving the EU's single market and customs union. These two positions appear to be in contradiction.
" David Davis has again proved himself a liability. Just days after the PM reached a stage one agreement with the EU he very nearly undermined negotiations by claiming that the UK Government may not even stand by the deal. This has not gone down well in the EU and therefore the European Parliament is demanding a quick withdrawal agreement that puts the UK's commitments on a legal basis.
"It has always been clear that the UK could not maintain all the benefits of EU membership after leaving the EU. Sadly the leave campaign made false promises and lied to voters. That's why I believe that there should be a public vote on the final deal."