https://www.forbes.com/sites/niallmccarthy/2020/03/12/the-co...
https://www.forbes.com/sites/niallmccarthy/2020/03/12/the-co...
All seem to come from the same sources, a 2009 and a 2012 study. The Forbes article actually mentions an alternative source, an article from 2015 [2] which is actually looking at regional 2000-2009 data. You can also follow the links at Wikipedia [0].
For Germany, there are numbers from 2017: The German Office for Statistics is reported in 2019 28.031 ICU beds which is a rate of 33.7 per 100,000 inhabitants.
EDIT: This [3] WoPo article references data from 2016-2018: 93,000 ICU beds in total in the US. That's about 36 ICU beds per capita (aged 16 or older).
For comparison, Germany, based on the 28031 ICU beds and 70976000 inhabitants 16 or older [4] has 39,49 ICU beds per capita.
[0] https://en.wikipedia.org/wiki/List_of_countries_by_hospital_...
[1] https://www.sciencemediacenter.de/alle-angebote/fact-sheet/d...
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4351597/
[3] https://www.washingtonpost.com/business/2020/03/23/map-place...
[4] https://www-genesis.destatis.de/genesis//online?operation=ta...
Why would this be unique to germany. Can we just assume this is more or less identical everywhere?
https://en.wikipedia.org/wiki/List_of_countries_by_hospital_...
Based on these numbers and in light of the current situation in Spain, the situation in the UK will indeed get very difficult.