Can I legally replace a UK domestic electric consumer unit without requiring an electrician to verify the work

ive had the same problem last year... i just changed all that i needed to ..checked it all through properlly... then informed the LEB ...i told them i broke all their seals to fit the new MCB...they sent an engineer to check things out... re sealed the unit...and said everything was fine...im not a sparks but im competant to do the work....and at that time i didnt require a certifacate........good luck have fun and go for it...