The results of our search for Brian were on Radio Five at about 11.30pm Boxing Day Night and you can catch them on the Listen Again feature (if you skip to about 1hour 25 mins in - you'll hear the section on blogs). or for a speedier version, Brian who is far more technical than me managed to record it here.
We never found Brian, but I did manage to leave with a deposit from one of his mates on my hood. One also flew onto my shoulder during the recording and on to the microphone so they are bold little b'stards and not publicity shy.
I'll leave you with Brian's pigeon cam of an evening he spent on the London Underground. Hopefully looking at the tube from that perspective won't make you feel too weird as I think he was a bit drunk when he shot it as he spends too long focussing on a discarded can of Carling at the start.