Original sentence: Since then, the Cockney accent has been more accepted as an alternative form of the English Language rather than an 'inferior' one; in the 1950s the only accent to be heard on the BBC (except in entertainment programmes such as Sooty) was RP, whereas nowadays many different accents, including Cockney or ones heavily influenced by it, can be heard on the BBC
Edited sentence: Since then, the Cockney accent has been more accepted as an alternative form of the English Language rather than an 'inferior' one; in the 1950s the only accent to be heard on the BBC (except in trivial programmes such as Sooty) was RP, whereas nowadays many different accents, including Cockney or ones heavily influenced by it, can be heard on the BBC