IR35, also known as the Inland Revenue 35 was introduced on 6th April 2000. The aim of IR35 is to eliminate the avoidance of Tax and National Insurance Contributions through the use of intermediaries e.g. PSCs.
IR35 is a piece of legislation that dictates how you pay your tax. If you are deemed to be operating in a way exactly like that of an employee, then you have to pay PAYE tax as like those who are in permanent employment. If you are not deemed to be operating in this manner then you can experience tax benefits.
IR35 is in place to prevent disguised employment, using Infinity Solutions as your employer will mean that IR35 does not apply as your employment status is an employee of Infinity Solution as you have a full contract of employment.