The Merriam Webster dictionary definition of fascism is:
"Definition of fascism
a political philosophy, movement, or regime (such as that of the Fascisti) that exalts nation and often race above the individual and that stands for a centralized autocratic government headed by a dictatorial leader, severe economic and social regimentation, and forcible suppression of opposition"
Right now, in the UK the nation is being exalted above the individual ("Stay Home. Save Lives. Protect the National Health Service").
Government is highly centralised as local authorities have very little say in lockdown policy. It is also autocratic, in that a select small group of advisers dictate policy, and no account is taken of dissenting voices.
There is severe economic and social regimentation - just take a look out of your window.
Opposition is being forcibly repressed - demonstrations are banned, media messages are being controlled by the government and dissenting voices on social media are being repressed:
Zerohedge's twitter account was suspended for suggesting that the virus might have escaped from the Wuhan virology lab.
More recently, You Tube took down a video posted by California ER doctors setting out their reasons why they disagreed with the lockdown.