Dear UK IDAC users, The Butler service of the UK IDAC will be offline on 1st May during 1:30pm–2:30pm UK BST (UTC +01:00) for maintenance. During this time, attempts to use the Butler (e.g., running LSST Pipeline operations that interact with the Butler repository) will not work. We expect the service only to be offline for five minutes of so, though have reserved an hour in case of problems. Thanks in advance for your patience, George.