This is engine 207 (aka Boyne) at Conniberry, Co. Laois. According to our catalogue, this picture was taken while 207 was "getting coal supplies". However, the consensus from comments below is that it is water that's being taken on, so I'll change the description in our catalogue...
Thanks to a link provided by blackpoolbeach
, we now know this engine was blue
Date: Monday, 24 April 1961
NLI Ref.: ODEA 25/44
Owner: National Library of Ireland on The Commons
Source: Flickr Commons