Sorry about this folks but the drimnagh castle trip is cancelled on account of the fact that they don't do tours on Sundays anymore - this was not the case on the online literature I looked at, however they are open mon to thurs 9pm to 4pm for tours fri 9pm till 12.30pm these not much use to most people I guess.
Anyway the person I used to know is still working there and I will try and ask them if we can organise a seperate viewing in the future outside of workday hours pref on a Sunday but it would mean them doing us a big favour. So we will see. OK will try and think of a seperate venue