London's New Year's Day 25th Anniversary parade can be viewed on the BBC's website. The entire video is over four hours in length.
DMHS performing SPIES at 3:11.49
DMHS entering and performing at Mass Band Grand Finale at 4:04.4
Scottsdale CityCable 11 is tentatively scheduled to replay the broadcast in mid-January.
The band's trip to London has been covered by Scottsdale Republic (article), ABC News 15, Fox 10 Morning Show, and the following sites.