Based on the dates that have been ruled out in this thread, the possible days are:
FRI SAT MON TUE THU FRI
11 12 14 15 17 18
The 17th is Paddy's day, so that might have plans made already.
Other than that, everyone in the thread said they were free the other days, so whichever suits yourself Dave.
Nick Prendergast said he was interested too - I think he's in Madrid on a class trip at the moment though.
Hope that's helpful!