Zowie on track for Friday number 1
The first Friday number one could be landed by DJ David Zowie and his debut single House Every Weekend.
The chart is moving after the music industry agreed to make Friday the global release date for new albums and singles, with the first one announced this week and the first full seven-day chart next Friday.
Mid-week sales figures from the Official Charts Company show the dance track jumped 51 places after its full download release, putting it ahead of Years and Years' single Shine.
US girl group Fifth Harmony are in third place with their single Worth It featuring Kid Ink, with last week's number one, Lost Frequencies, and Tinie Tempah making up the top five as it stands at the moment.
The albums chart looks set to be topped by Ed Sheeran with x - its fourth stint as number one.
The move to Friday is the biggest change to the charts since 1987 when they were switched to Sunday evenings from Tuesdays.
A synchronised release day will allow fans to get their hands on new releases at the same time and the music industry hopes it will help cut down on piracy.
Different countries previously had different release days, with new music being released on Mondays in the UK, Tuesdays in the US and Fridays in Australia.