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If there are meant to be pictures with these two observations, you need to give them time to load. This can take a while - my attempts yesterday took half an hour!
Go to My Spot - Observations. Select one of them, click on edit, and re-load the picture. Wait until you see the "thumbnail" image appear.
If there are no pictures, just mention this when you add the posts.
There, let's see if this works better!
I'm no expert, but it certainly looks like a hydroid.
Definitely oaten pipe hydroid, it's really a subtidal species, see it a lot on dives round the Kent coast. I've hardly ever seen it washed up, hence putting this pic up :)
Lat/Lng: 51.3791, 1.4482
OS grid ref: TR400700