Jim, May was just reiterating Britain's stated position on the post Brexit border. Britain does not require or want any change.

Teresa May in case you had forgotten is the leader of the British Government
Yes, but Dublin's Foreign Affairs Minister Charlie Flanagan is not.

If no-one wants a change to the border there will not be one, and this is not an issue.
The problem is that EU wants to make things difficult, and Dublin has to toe their line.

EU wants there to be a problem with the border and will make it an issue, and Dublin will have to choose which side it is on.

(One obvious solution would be for Ireland to join us in leaving EU.)