In terms of GBP going into my bank account nothing.
I've mined over 250,000 Dogecoins (currency deemed most profitable on CoinWarz) in about 48 hours. Somebody today offered me £400 for 500,000 - so I'll let you do the math and work out how much I could potentially make per month.
That would be a strict mine-sell setup for instant cash. I'd prefer to sell say, 60% instantly for the income and keep 40% in reserves that I can then trade for other currencies. WorldCoin is an up and coming currency that is expected to rise greatly next year to in excess of $1 a coin so I've just put 1.5MH/s mining that.
Hope that answers your question - there's no clear answer really as it depends on each persons approach to it.