The Pound is so so low at the moment - and it should really help massively with exports, as we can sell much more cheaply- you could even call it unfair competition. But due to Brexit, we can't export - so not much advantage there.
On the other hand, it makes importing hugely more expensive. Medicines, vaccines, essential chemicals like chlorine, food, and so much more. And yes, ENERGY- as most energy providers are foreign- we have to buy in their currency. If we can't afford to do so, they will be quite happy to sell to countries with much higher currency values- putting their profits up hugely.