For fiction's sake: if France only had 50 deaths/million and according to your "only 300 more people/million more" the UK would have 350 deaths/million, that's "only 0.03% more" but geez, 7x more deadly in the UK than in France!
According to [1], the UK has so far 2351.99 deaths/M and France has 1868.02. The rate of death is 26% higher in the UK.
And that's 0.186% vs 0.235% rate of death. 0.049% (or even 0.03% from your data) is still a big jump.
[1] https://www.statista.com/statistics/1104709/coronavirus-deat...