I don't think I was ever fast enough to ride with Rocco, but I did once briefly latch on to the back of 'Rocco's Rocket', the tightly-controlled group of mostly Willesden CC riders who flew round PBP enjoying a good night's sleep every night. Nevertheless, I met him on many occasions, the last time being at Nev Chanin's funeral, when he told me how ill he had been. His illustration of how ill he was was the time he had taken to ride 100 km.
I first remember Rocco when he took over as AUK's chairman in the late 1980s, following the disputes of c 1987, when the club needed a period of stability. He had his own somewhat unconventional style as chairman at the AGM. He didn't try to hide his exasperation at times (e.g. mudguard debates).
At the other end of the scale, when the toilets were found to be blocked at the Potters Bar 'London' control on the 1993 LEL, it was Rocco who rolled up his sleeves and set about the task of unblocking them.
Here is a lovely photo of Nev and Rocco by HK, taken at the 2002 AGM weekend.