"In late 2019, one of the two launch sites for Soyuz rockets on Baikonur will be decommissioned. Thus, all the load of over 15 Soyuz launches in 2020 will be placed on the remaining launchpad," the source said.
The source noted that a large number of Soyuz launches planned for 2020 was related to the implementation of the OneWeb internet satellite cancellation project, which would require up to eight launches. Moreover, from five to seven launches of manned missions on Soyuz and Progress spacecraft to the International Space Station (ISS), as well as several launches of unmanned spacecraft have been planned.
The source continued by saying there was a "bottleneck" in the capacity of the testing facility at the launch site 31, which amounted to 15 rockets per year.
Moreover, the capacity of the platform for preparing the Fregat upper stage for the launch, which is located at the same facility, is low, too, according to the source. The official noted, that it took almost two months to prepare a Fregat for a launch.