Daily Covid case rates among those in their 20s are the highest recorded ever since mass testing began.
Coronavirus cases have continued to be highest among those aged 20 to 29 for some weeks, according to reports.
Now there is a seven-day rate of 1,154.7 per 100,000 people, or 1 in 100, according to Public Health England.
It comes as more than 1.5 million people over 18 remain unvaccinated in the capital.
Official figures published by NHS England show 9,408,549 jabs had been administered in the capital on Sunday evening.
However, only 4,318 first jabs were given on Sunday as the number of young Londoners coming forward for a jab continues to decline.
It comes as the government is mounted with pressure because of the effects of the “pingdemic.”
The message told Britons they had been in close contact with someone who had tested positive for coronavirus.
It also shows that more people than ever are being pinged with a 17 per cent rise since last week.
This has led to serious staff shortages in different industries including food supply and retail.
Major UK supermarkets, including Sainsburys and Lidl, have now warned their customers some of their favourite products could be missing from the shelves due to shortages.
Some firms have been forced to hire thousands of temporary staff to make up for the lack of people coming into work on a weekly basis.
Despite the wide-spread criticism of the app, Business Secretary Kwasi Kwarteng urged people not to delete their NHS Test and Trace app to avoid being “pinged”.