Will I have any trouble with getting Schengen visa?
Mycket troligt ja, även om Storbritannien inte är en del av Schengenzonen, samarbetar den i SIS (Schengens informationssystem ). En av förutsättningarna för att få Schengenvisum är att inte flaggas i SIS.
In accordance with the protocol to the Treaty of Amsterdam, Ireland
and the United Kingdom can take part in some or all of the Schengen
arrangements, if the Schengen Member States and the government
representative of the country in question vote unanimously in favour
within the Council.
In March 1999, the United Kingdom asked to cooperate in some aspects
of Schengen, namely police and judicial cooperation in criminal
matters, the fight against drugs and the SIS. The Council Decision
2000/365/EC approving the request by the United Kingdom was adopted on
29 May 2000.
(source: "The Schengen area and cooperation")