Grey or common seals

Grey or common seals

Observation - Grey or common seals - UK and Ireland. Description: Grey or common seals I saw these two seals in Suffolk last year. One of them is grey but, confusingly, the other one is brown. Can someone tell what species they are please?

Grey or common seals
I saw these two seals in Suffolk last year.
One of them is grey but, confusingly, the other one is brown.
Can someone tell what species they are please?