Original sentence: From the very beginning the top 20 hit numbers running from 20 to 1 were also broadcast simultaneously on the BBC Radio 2 FM (and 1500 metres Long Wave although in mono) transmitters in stereophonic sound (88-91 MHz) at exactly 6 p.each Sunday called "Solid Gold Sixty" selecting hits which were becoming popular (not necessarily in numerical order including those that were 'bubbling under' between 60 and 21) and was broadcast on 247 metres medium wave (BBC Radio 1's first frequency before moving to 275/285 metres)
Edited sentence: From the very beginning the top 20 hit numbers running from 20 to 1 were also broadcast simultaneously on the BBC Radio 2 transmitters in stereophonic sound (88-91 MHz) and on long wave at exactly 6 p.each Sunday called "Solid Gold Sixty" selecting hits which were becoming popular (not necessarily in numerical order including those that were 'bubbling under' between 60 and 21) and was broadcast on Radio 1