Last night at Oasis Leisure Centre in Swindon, England, two of the top light heavyweights in the UK saw action but had very different results. Commonwealth kingpin Nathan Cleverly, 15-0 (5), continued to show excellent form while destroying big puncher Samson Onyango, 18-4 (12), of Kenya in a single round. Onyango, nicknamed “The Hammer” came…