British Prime Minister Theresa May has warned rebels in her party the alternative to her potential Brexit deal with the EU is no deal.

The UK is due to leave the EU on March 29, yet little is clear.

There is, so far, no full exit agreement and some rebels in May's Conservative Party have threatened to vote down a deal if she clinches one.

The main sticking point to agreeing a deal between Britain and the EU is the issue of ensuring there will be no hard border between Northern Ireland and the Irish Republic after Brexit.