I like it, 4/5 for now - need to see how this would animate, are you thinking similar to NBC's or more fitting to the 2008 NAT music? I think a 'fly through' with the mosaic tiles would be really impressive visually...
I’d probably set to the ‘08 NaT theme, but ideally it would be re-orchestrated, for example I don’t like the horn sounds because they sound too ‘synth-y’, get some more strings in, lighten it all slightly. The GMB orchestrals are pretty nice so ideally something similar. Update the fly-through with newer skyline, mixed with the turning mosiac tiles ITV currently use
Woodpecker and Mike W gave kudos