You mean how to steal power? Call up your provider, they might have suspended cutting people off with this “crisis” going on.
If you do try to steal power, they’ll probably catch you. They’ve made it much harder nowadays with digital meters. And when they do catch you, they cut you off and usually charge a tampering fee of at least a few hundred dollars plus whatever you owed before they turn it back on.
Not sure how far along they are in jolly old England, but here we got something like these:
A lot of modern ones have anti theft sensors that send out a signal if you yank it off from the wall and they send someone out to check it like the next day. If you can somehow take the canopy off the meter (the plastic bit that covers the front) without breaking it, there are ways to hack the firmware.
If you still have one of the old analog meters they’re much easier to rip off, but most of the methods are fairly obvious and they send someone every month to read it. You would have to find out what day of the month they take the reading and work around that.
What kind of meter do you have? Digital or analog? And do you live in an apartment or some other building with other units, or a single detached house?