Singer fronted band's recent tour
Guitarist says Lambert is the only person capable of filling Freddie Mercury's shoes
"I think Freddie would look at this guy and think, 'Hmm ... You bastard. You can do this,'" says guitarist
'Queen + Adam Lambert Rock Big Ben Live' will be broadcast live on BBC One
Band add gigs in London, Liverpool and Sheffield to schedule
Queen musician reportedly didn't want to put instrument in baggage hold
Track marks first day of music-led campaign by Coca-Cola and (RED)
The Queen musician has collected over 100,000 images since his band's early years
Band also announce cinema screenings of 1981 concert film 'Live At Montreal'
Song will appear on forthcoming Queen album 'Queen Forever'