That was how I thought it worked. It's a lot clearer on that link you sent, cheers.
I presume there's a way for me to carry the losses I made last year (buying things like a frame jig) into this year when I do this years return. Hopefully that'll become clear once I start doing it.
It's £1000 gross. So you'll need to do a tax return.
It's too do with the trading allowance
https://www.gov.uk/guidance/tax-free-allowances-on-property-and-trading-income#trade