Yes, but you don't seem willing to accept that electrical work must be tested and you are not able to do it
I am not saying that you and millions of others do not do work without testing; that's how it is; but there is no point asking what you should do.
Nothing is statutory except Part P of The Building Regulations and Regulation 12 which lists notifiable work.
View attachment 319557
Can you ensure that without testing?
Part 6 of The Wiring Regulations.
That is because you do not seem to realise that DIY and non-notifiable are nothing to do with each other.
All work is allowed to be done by what we mean as DIY.
Some work is notifiable. Whether by DIY or by electricians is immaterial..