Should my MoT have notified me that the underside of my car was rusty?

Last year I had the MoT done on my car at the same garage that I purchased it from. On the MoT certificate it stated that there was a small patch of rust underneath the car that needed welding as an advisory. This time I decided to take it to another garage. Bearing in mind it's only 11.5 months since the MoT, the garage has stated that the entire underside of the car needs welding because the the floor was so weak they could poke their tools through it. It was a right mess and should have been picked up on the previous MoT. I feel I've had the wool pulled over my eyes about this.
You were advised about the rust last year and did nothing about it. Since then it has got much worse. Rust does.
Answered by Honest John on

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