Calculated total deaths, 2015 (pop. 64.85 million): 595,258.15; 2020 (pop. 67.89 million): 639,048.57.
Difference: 43,790.42. Weekly averages: 11,000 - 12,000.
See Figure 1, https://assets.publishing.service.gov.uk/government/uploads/... for a chart of England's excess mortality.
"In week 16 2020, an estimated 22,351 all-cause deaths were registered in England and Wales (source: Office for National Statistics). This is an increase compared to the 18,516 estimated death registrations in week 152020. ... In the devolved administrations,no statistically significant excess all-cause mortality for all ages was observed for Northern Ireland or Wales in week 17. Statistically significant excess all-cause mortality for all ages was observed for Scotland in week 15." (https://assets.publishing.service.gov.uk/government/uploads/...)
It looks like the peak occurred in week 17, with 22,351 deaths.