Is Ireland going to be the issue that prevents a deal and if so, what happens next ?

Unless a decent number of Labour politicians support Mrs May and Corbyn is telling them not to, there doesnt look any way that the deal will make it through Parliament.

Why wasn't such an important issue discussed with the voters, instead of the big red bus ??

Because it was only really about keeping forriners out. The same myopic xenophobes are now saying put the border back with Eire. They'll be happy with a few dead Irish but might change their tune when the first bomb goes off in mainland UK.

Now we know what a shambles and failure Brexit will be, with the nhs getting less funding not more as promised by the lies on the big red bus. We know the nhs will have a shortage of medicines and we will have food shortages with empty supermarket shelves. Now that is public knowledge the only thing that can happen next is a people’s vote.

Jeremy Corbyn spends his whole parliamentary career disobeying his party leaders instructions , and now he expects them to go against their constituents wishes because he wants to really mess the country up

Hypocrit of the highest order

Unless you can see into the future you have no knowledge about supermarket shelves being empty. Meanwhile it’s pure comedy gold with the March of snowflakes in London yesterday . Highly entertaining to see the ranks of smug faces on view. Even more amusing to see the political failures on the stage Chuka is finished in the Labour Party, likewise soubry is finished in the Conservative party. Cleggy unfortunately could not attend, remember him destroying the Liberal Democrats party. He is on is way to California with a million dollar salary. Bye bye snowflake suckers I am a man of principal, until someone waves a bag of money under my nose. This farce shows no sign of abating,it’s highly entertaining, long may it continue.

Apologies I have missed out the biggest howler of the week. Alaister Campbell asking people to go on the London march. Andrew Neil reminding him that a million people marched in London against the Iraq war ,yet Campbell and Blair totally ignored them and we all know what happened thereafter.

Strangely enough, the horrors of the "troubles" have been at their peak during our membership of the Common Market /EU & during that time we didn't hear a peep from our Euro chums about solving the NI issues. This border debate is just a Euro ruse to scotch Brexit & to stop the good ship Great Britain sailing off into the seas of worldwide prosperity & away from this corrupt beaurocracy.

Corrupt bureaucracy, look no further than Westminster and the House of Lords
As for the "seas of worldwide prosperity

Tell me which countries that we dont currently trade with are going to bring this prosperity, should be interesting.

Why should having a border automatically lead to out and out warfare?

Erm, wasn't there a Northern Ireland and EIRE living side by side before we joined a trade agreement that was a smokescreen to political/legal/monetary/absolutely total European union?
Why should there be any changes to the border? I don't get it, and it does seem a ploy to delay/derail brexit.

Are you sure ?

As for delaying tactics, just nonsense but, this should have been thought about and dealt with 2 years ago and not left until the last minute.
Notwistanding the fact that Mrs May has signed her name to the "backstop" but now realises that this is going to cause her downfall and alienate either part of the Tory part or, her new best friends in The DUP.

The phrase "falling on her sword" springs to mind, poor Teresa

It's actually Cameron's sword, he must have left it behind when the vote on EU membership went rather unexpectedly and he did one. Not that it matters of course.

Boris Johnson's batty pater made a typically Johnson-esque intervention, saying on some TV show that "if the Irish want to shoot each other, they'll shoot each other."

The apple does not fall far from the inbred, xenophobic, politically myopic tree.

That is fair enough every is entitled to their opinion, I don't agree but I still don't see why a border leads directly to bloodshed?

It may not BUT, if we do go back to a hard border and The Irish start bombing each other, it will be too late.
This is something that should have been debated long ago and a strategy sorted out in advance of negotiations and it really doesn't help that The Tory majority is only kept in tact.

There should have been a cross party Brexit group to help forge the best future for the country, with those involved (from all parties) committed to getting the job done.
Instead, we've had a fractured Tory party, muddling through and compromising to keep their own party in government and we look like ending up with the worst deal possible.
The one sure thing is that very few people voted for what we are likely to end up with.