anybody self employed ?

[ant]

i could do with a bit of advice really people,im thinking of getting back into plumbing and working for myself,been out of the game for about 7 years, now working as a coded welder but now ive took vol redundancy im thinking of setting up my own plumbing buisness but looking around for work etc im seeing people asking for cis cards etc its all changed since i was plumbing before as i worked for a company and never thought about working for myself.just wondered if anyone could help me out with a bit of advice really and guide me in the right direction for trying to get started