Daithi (don't know how to get the accent)

Dáithí - yes I do with cut and paste - I think you may be right with the glottal stop: my wife is from Yorkshire and puts a glottal stop in the middle of thirty, forty etc (thir/?/ty, for/?/ty etc.). Strangely she doesn't hear it any differently whether or not it has a glottal stop.

It is she who insists it's Bratford: I'm from Notts, and have only academic interest.

Since your earlier post I ended up with a goole-trawl on glottal stop. Fascinating...

Stu