I agree you don’t. But that is not what I said. In your scenario you, your dealer, found something wrong and it was rectified. That happens all the time when you maintain a vehicle.
Just to flag that as they marked an issue as dangerous, you shouldn't be driving the vehicle (even if your previous MOT is still valid): Getting an MOT
They changed and clarified the rules about this in the last couple of years! If you take your MOT test early and it fails with a dangerous, you can't rely on your previous valid MOT.
Ultimately though, you drove it in, it's no more dangerous when you drive it out except that you can then make driving allowances for a fault you now know about.
Which doesn't mean it* wasn't dangerous and unroadworthy when it was driven in.Which the new laws are intended to address more forcefully.
it* being a generic vehicle, not the OP's.Those pads, combined with a brake test pass, should have been sent on their merry way without any penalty.
You take your chances with the new rules though and risk a fine and points on your license.
Ultimately, what if there is a real issue, what if someone gets hurt, what would happen to your insurance. It just need to be sorted, and it can only be sorted by either dealing with the original MOT station and have it retested, or go somewhere else. Either way none of us on the basis of some photos can determine the true state and issues (or not) that have been uncovered.
Legally, you cannot drive the car away, although you can have it recovered to another garage.
The OP could have been fined £2500 if he had been stopped on the way home.
That the garage was that negligent not to point this out speaks volumes...
It just looks like a sticking slide not necessarily a piston. As the piston pushes one pad it pulls the other side towards it, the slide rusts and they don't open up again. Next time you've been out in it just feel the wheel centres and the heat will be obvious on the sticky slide. I can't claim 40 years as a mechanic but I've been doing brakes, welding bodywork and rebuilding engines and cylinder heads for 50 years. Get them stripped and cleaned up there's plenty of meat left on the pads and there's not much lip on the discs.
So after years of being told, dodgy MOT stations will fail a vehicle for work that doesn't need doing to pass, if you don't trust them take it to a council testing station who don't do customer repairs as they've no incentive to fail it for chargeable work, now if they fail it you're stuck. And if you do your own repairs or have a preferred garage who don't do MOTs and just want a 'full test report' to tell you what needs doing, you then have to have the testing station fix any dangerouses.
What is the legal standing if they fix the dangerouses and you want to take the vehicle away to see to other issues - they can't issue a 'pass' ?
Vehicle transporter to transport the car. That will do the trick.