The Official Charts Company have altered their sales formula as a result of a growing demand for streaming singles in the UK.

From January, the amount of streams needed to equate to one physical sale will rise from 100 to 150. It is hoped that this will potentially avoid instances where tracks popular on streaming services stick at No.1 for weeks.

Martin Talbot, chief executive of the Official Chart Company, said: "It is testament to the rapidly changing nature of music consumption in the UK - and the huge shift we are seeing towards streaming - that we are updating the way we measure the contribution of streams to the make-up of the official charts as quickly as we are.

"Streaming is growing exponentially and the weighting we use to reflect its impact will inevitably keep evolving with it."

Only 11 songs have reached No.1 on the UK singles chart this year, which is 15 less than the previous year. Drake's 'One Dance', for instance, sat at the top spot for 15 weeks.

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Watch videos for some of this year's No.1 singles below: