Earlier in 2019, the HSE released their bulletin announcing that Mild Steel welding fumes was now classed as carcinogen. This put Mild steel welding into the same category as Stainless and Galv welding (just to name a few examples). The announcement didn’t come with any clear advice on control. The HSE have reacted to criticism and have updated their information and advice on controlling Welding fumes.
Follow the link to the HSE website. You will find lots of practical information on the legal expectations to achieve control of the fume. There are lots of photos and videos raising some valid points in helping you decide what is the best control for your risk.