A great find John and well done with the identification after never having seen this species before.
They will probably move on tonight if the weather is fine and the sky clear but still worth checking tomorrow (?)
This is the blog for bird sightings and related news in the Calderdale area. It is generally updated daily. Any non-member wishing to report and post sightings should send them to info(at)calderdalebirds(dot)co(dot)uk