RNA mutations in the new coronavirus (SARS-CoV-2) mutant strain (B.1.1.7), which is all the rage in the UK

There is a recent report on RNA mutations in the new coronavirus (SARS-CoV-2) mutant strain (B.1.1.7), which is all the rage in the UK.

https://virological.org/t/preliminary-genomic-characterisation-of-an-emergent-sars-cov-2-lineage-in-the-uk-defined-by-a-novel-set-of-spike-mutations/563

There are 14 non-synonymous mutations, 6 synonymous mutations and 3 deletions, and it seems to be a fairly large mutation.