No there is no evidence yet. There are clues that it might be but also clues it might not be. There are so many confounding variables it is hard to actually see the severity only. We simply do not know yet. The signs from Denmark, a country closer to the UK for age stratigraphy, serology and population dynamics are encouraging and it seems 0.6% of the infection needs hospitalization, contrary to 1.5% for Delta. But that means it is as severe as the Wuhan strain.