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I think your other wee one is most likely another Taurulus bubalis also. They havent got as bulbous a head when very small but the barred markings on the tail also suggest its a Sea Scorpion.
The white barbel below and to the rear of the eye (which seperates T bubalis from Myoxocephalus scorpius)can only be seen on the fish on the left.
T bubalis seems to be very common in rockpools but as yet I havent once seen a juvenile M scorpius in my local rockpools but they are occasionally caught as adults by anglers in the adjacent deeper inshore waters. All the young ones I have seen are Tb. They are lovely looking fish.
Thank you very much for your reply. I will look for the white barbel in future, as I was not aware that this was a feature.
Lat/Lng: 56.0607, -2.7169
OS grid ref: NT554855