I know Brad’s father in law reasonably well.
I’ve raced with Brad a few times, Herne Hill back in the day (he’s about 2 years younger than me so he was always put up into our age group where he’d thrash all of us as well) and once or twice at Preston Sports Arena.
Back when he rode for Credit Agricole and then Cofidis, before he was married, he used to stay with Cath, ride some of the evening 10’s and occasionally pop into Preston for the Thursday evening crits. He’d tow the bunch round at 30mph for 45 minutes then slip off and let the remnants of the bunch contest the sprint. No-one really paid him too much attention – everyone knew who he was but it was well before he was properly famous. Last crit I did with him averaged 29mph and I used 3 gears on my bike: 53 x 12, 13 & 14!
About the best you can hope for is to send a letter to them both c/o Team GB at Manchester velodrome and maybe one of the publicity agents will pop a signed card in the post. I know Chris Hoy responded personally to all the cards he got post-Olympics.
If you’re ever around Manchester it’s worth popping into the velodrome canteen, you quite often see some of the big names in there. Matt Crampton, Ed Clancy, Geraint Thomas (when he was doing track pre-Olympics), Jason Kenny, Jo Rowsell, Laura Trott, Dani King, Becky James are all regulars in there.