This week we take a deep dive into the announcement that rugby union may introduce a 50-22 rule modelled on rugby league’s 40-20. Is it another case of union stealing league’s clothes? This week’s ten-minute rugby time tunnel looks at the evolution of rugby rules and asks if it is inevitable that union will go down the same road as league. For more on the history of rugby and the other football codes, follow me on Twitter @collinstony and at www.rugbyreloaded.com