is the aircraft night stopping at DSA?
If not then it is w patterns. if it is night stopping then it is basing without a crew base. But logistically this is not such a smart move if anything was to go wrong in terms of delays/knock on effects.
BOH 'hub' would be great if the planes flew in in the morning from GLA, MAN and on to Europe in the day time and returning back to GLA, MAN in the evening. Not sure how crew base could work though or again if technical issues occured