I am rather surprised at this.
Are you working as a Ltd Company ? and if so are you on LinkUp.
If not, and you are going through another Company, they are responsible for the PI Liability, not you, under their LinkUp approval.
I know of individuals working part time on the Infrastructure as TIC/Testers who do not have this problem through their arrangements.
PM me if you prefer to keep the details private and want to know any more.