Forcing prices to rise is not inflation, increasing VAT would tip companies who are on the edge of bankruptcy as people stop spending to focus on essentials.
That company owes 1million lets say, once they go bankrupt, that million is gone, this is deflation.
The reason this is a horrible idea is because it targets the lower end of income unfairly. A rich person doesn't care if something costs £200k, or £210k
Fiscal means anything related to the government, so taxes, and spending, if the government lowers spending, there is a surplus, that surplus is then used to pay debt (government bonds), while the BOE sells government bonds into the market.
This then removes money from the economy, it is deflation, (government buying back bonds from the BOE balance sheet essentially is deleting money from existence) and will then impact firstly to stop prices rising, and if you keep at it, you will decrease prices.
As we are in a global world, the strength of the £ would rise in this example to compensate
But rate rises target only a slightly better off demographic.
Rate rise hit rent and FTBs most.
And vat can be tailored to not be added to food/energy. I but be piled onto new cars, home improvements etc etc