Some old guy from the depths of rural Norfolk, I’d guess. But then the t might be replaced with a glottal stop.
A friend's younger cousin from not far from there (Lowestoft iirc?) would say this - one memory I have is how he squished "can I play the computer?" to "ca' play compoota?" (which after discovering Monkey Island he said quite a lot). Might have been a kid thing rather than a regional thing though :)