"Lundy and Irish Sea Pilot" by Imray covers most of the Channel. In conjunction with Reeds and the Blue Book covers just about all you can think of.
Also if you can find a second hand one there is an old out of print (and in parts out of date) Bristol Channel and Severn Pilot hardback by Peter Cumberlidge which can be interesting although most of it is in the Lundy & Irish Sea Pilot.