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Coryne muscoides is a hydroid where the hydranths, the feeding polyps, are arranged alternately on longish pedicels. Here is a good picture.
Your hydroid has a more regular arrangement, pinnate with hydranths in two rows. This seems to me to be more like the hydroid group called Sertulariidae, perhaps Abietinaria abietina. http://www.habitas.org.uk/marinelife/photo.asp?item=abiabi
Have a look and se what you think.
Lat/Lng: 52.95231, 0.49622
OS grid ref: TF677423