Started Agency Work - Having to pay them (Umbrella Co)

gov.uk/government/publicati … termediary. Read this Conor

What happens to the NI contributions towards one’s state pension btw?

If Umbrella outfits are “NI-Dodging” all the time - then surely an employee on the payroll of such an outfit would find years down the line that there was a “gap” in their NI contributions - at least those that would otherwise had been paid as “Employer’s stamp” for that bod?