In reply to Lord of Starkness:
Sorry, do you really think there is no difference between adjusting your clothing and getting major assistance from another team ?
Rules have to be applied with common sense and Bertie wasn't riding along without his helmet for any length of time.
But the wheel is a differant matter - and my first thought (see higher up the thread) was not that it was illegal (like everyone else I didnt know there was a rule), but that it was unethical. For a start, giving someone a wheel is effectively sacrificing your own race - no one outside your team should do that. Secondly it's a standard tactic to wear down your rival's teams and leave him isolated. Far harder to do if he has a team of 18 rather than 9.
And collusion between teams when they share the same goal - pulling back a break, distancing a mutual rival, working to establish echelons and split up the peleton - are all valid tactics. But non-GC teams lending support to a GC team just cos he's a mate - very dubious.
At the Tour de Yorkshire you had Team Sky, Team WIGGINS (aka Sky B team) and GB cycling (sponsored by Sky) - any collusion between those teams to ensure Sky won the race would have been very unfair on the other teams.