Ultravox, Slow Motion (the old Ultravox, not the Slik version)
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Locomotive Breath from Jethro Tull
Sabbath Children of the Grave (inc the guitar bit)
The Floyd one from Division Bell, with the piano and bell intro
speaking of bells;
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Right now total lack of summer, after a couple beat of the drums it's summer in my head. So although not the greatest ever intro it's my favourite at the moment