Re: SPOUSAL Sponsorship PAKISTAN @ London Visa Office
Here is another link form Netherlands Mission in United Arab Emirates
http://uae.nlembassy.org/shared/products-and-services/products-and-services/schengen-visa/airport-transit-visa/airport-transit-visa.html
You do not require a Schengen airport transit visa, if you:
Hold a valid visa or residence permit issued by a Schengen state.
Hold a visa valid for a member state of the European Union or the European Economic Area, Canada, Japan or the United States.
Hold a valid residence permit issued by a member state of the European Union or the European Economic Area.
Hold a residence permit issued by the Principality of Andorra, Canada, Japan, the Republic of San Marino, or the United States, that guarantees unrestricted right of return.
Are a family member of a citizen of the European Union, the European Economic Area or Switzerland.
Hold a diplomatic passport.
Are on-duty aircrew and a national of a country that is a party to the Chicago Convention on International Civil Aviation.
Best option is to call Airlines it self.