I just (1:30 pm BST) saw a flying boat fly over my house (Fareham, south coast UK). Four engines, very low engine pitch, a flying boat hull, something like a Short Empire. Not a Catalina. Unfortunately, it was too brief and distant for me to get a tail number.
It was primarily painted blue, with a darker blue upper part. I think I could see an RAF roundel on the fuselage under the wing, except that wouldn't be the usual place for one.
Does anybody know what this is?