A London NFL franchise at Wembley faces three main problems
National Football League - Wikipedia
Wembley Stadium, American Football Database
NFL will stage three regular-season games at Wembley in 2014
NFL London 2011: Chicago hold on to beat Tampa Bay at Wembley
England Women v Germany live from Wembley on BBC Two – Sport On
NFL announces dates for 2014 Wembley matches - Mirror Online
Premier League 2014-15 season: Club-by-club guide - BBC Sport
Geoff thomas hi-res stock photography and images - Page 3 - Alamy
Premier League 2014-15 season: Club-by-club guide - BBC Sport
England 3-2 Scotland - BBC Sport
Women's World Cup final: How England became good at women's
Women's FA Cup: sold-out Wembley establishes final as national
NFL in the UK: Where we are and what happens next? - BBC News
Olympic Stadium: NFL in talks with mayor Boris Johnson - BBC Sport