Across the UK, there were 521,602 positive test results in the week to December 16, up 51% from the week before.
The average rate of infection in Lancashire as of December 16 is 488.5 per 100,000 people, an increase of 56.2% on the previous week.
At neighbourhood level, Covid-19 case rates have been published for the week to December 16.
Here are the neighbourhoods in Preston with the biggest rise in case rates in the past week.
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9. Ashton-on-Ribble & Larches
Ashton-on-Ribble & Larches had 462.0 Covid-19 cases per 100,000 people in the latest week, a rise of44.1% from the week before.
10. Longsands
Longsands had 534.0 Covid-19 cases per 100,000 people in the latest week, a rise of 40% from the week before.
11. Moor Park
Moor Park had 393.8 Covid-19 cases per 100,000 people in the latest week, a rise of 21.7% from the week before.
12. Frenchwood & Fishwick
Frenchwood & Fishwick had 194.1 Covid-19 cases per 100,000 people in the latest week, a rise of 12.5% from the week before.