who had received the Pfizer/BioNTech jab were able to neutralise a version of the new UK variant, the so-called B.1.187, which has “an unusual large” number of mutations with 10 amino acid changes in the spike protein, and is reported to be more contagious.
https://www.neweurope.eu/article/pfizer-biontech-vaccine-likely-to-protect-against-covid-variant/