The Singles Chart will be 66 in four months but instead of retiring, it takes on a new, more radical shape this week, with the incorporation of video streaming and an adjustment to audio stream conversion rates making it more fit for purpose.

Despite these radical changes – which value both audio and video streams on subscription services at 1/100th of a sale and on ad-funded services at 1/600th of a sale – there is no change at the top of the ...