Second cy is impossible because the outer primaries are clearly no longer juvenile. It has to be at least a 3rd cy.
In a 3cy Med Gull with such a developed hood, I would certainly not expect to see such a greenish colour on legs and bill. Actually, there is not a single plumage of Med Gull in which they show such greenish legs; normally, the legs are rather dark. Leg colour, bill colour and bill pattern of this bird are suspiciously similar to Common Gull!
The primary pattern is wrong for any type of Med Gull. If you look at the underside of the wingtip (i.e. the underside of P10), you can see a large white mirror combined with an all-black inner web - just as in Common Gull. Some 2nd-cycle Med Gulls have a rather large amount of black on the outer primaries, but the inner webs of these feathers are largely white, so in other words, if you look at the underside of the wingtip of a 3cy Med Gull, you will notice that it is largely pale, not black. See
http://gull-research.org/melanos/med03cy.html.
In addition, there is also too much contrast between the grey upperparts and white underparts (Med Gull always has very pale upperparts), and too much contrast between the grey tongue and white tongue-tip of the exposed P7.
This has to be one of the clearest examples of a hybrid Common x Med Gull, a rare combination!
