The trial of Thomas Mair concluded today, after he pleaded not guilty and he was found guilty. He was sentenced, on his first conviction, to a 'whole life' sentence i.e. unless the Home Secretary intervenes he will die in jail.

From a statement by the prosecutor (known here as CPS):
Mair has offered no explanation for his actions but the prosecution was able to demonstrate that, motivated by hate, his pre-meditated crimes were nothing less than acts of terrorism designed to advance his twisted ideology.
Which is within this backgrounder on his Nazi and his other interests:http://tellmamauk.org/neo-nazi-terro...jo-cox-murder/

The judge's sentencing remarks are noteworthy:https://www.judiciary.gov.uk/wp-cont...homas-mair.pdf