After the last Collab. Meeting in Fermilab in Oct. 2019, there have been several important developments in collaboration matters. The 2019 LIU/HL-LHC C&SR outcome was very positive with inclusion in the baseline of the various pending options

The period following the 9th Collaboration Meeting in Fermilab, 14-17 November 2019, has been exceptionally rich in events. The most striking has certainly been the COVID-19 emergency, with long periods of lockdown almost everywhere.

Due to the COVID-19 restrictions last year, the 2020 annual meeting initially planned to take place in Uppsala had to be postponed and instead the 10th HL-LHC Collaboration Meeting was held in virtual form and limited to plenary sessions.