Well this is fun:
You can click on an area - such as say Bolton - and you can watch B1617.2 arriving in April then spreading out to the surrounding areas.
(It's nothing, nothing, nothing, then it suddenly bursts into colour.
And/or look at your own area and see if it's reached you yet.
covid19.sanger.ac.uk/lineages/raw?latitude=53.762878&longitude=-2.675077&zoom=6.82&area=E08000033&lineage=B.1.617.2&view=map&colorBy=p&date=2021-03-06