Yep, the law already prohibits any dog of any breed from being dangerously out of control in a public place, further more, the dog does not have to physically harm someone to commit an offence, they just have to cause reasonable apprehension of injury - ie you might reasonably fear being tripped or knocked over.
Depending on the details and relevant factors, an owner can be given a control order, requiring them for example, to keep the dog muzzled in public; on a lead of a specified length in public, or in specified locations; ... all the way up to a seizure and destruction order.
The fact is, we have laws that are not being enforced, that are not policed, that we could use.
Adding more legislation to the situation really doesn't help if we aren't using what we already have.
Our animal welfare laws state it is an offence to cause unnecessary suffering, and yet abusive dog trainers up and down the country can stick a prong collar or choke collar on a dog and lift that dog off its feet and choke it and call it 'training', despite there being myriad alternatives.
We still haven't yet banned shock collars.
Both methods are known to increase aggressive and unpredictable behaviour in dogs.
We also know that breeding dogs like livestock, in huge numbers without access to human company, fresh air, quality food, health testing, exercise, socialisation and habituation to normal household life, results in temperamentally, behaviourally unstable dogs with health conditions likely to result in pain and further behavioural issues - we still have licenced puppy farmers doing all of the above. And their checks for licencing... are often done with prior announcement so they can tidy up before hand.
There is a shitload that needs sorting out with our animal related legislation, and the policing and enforcement of it here - adding another breed to a ban that did not work is not a great starting point, it's a backward step. (And don't get me wrong, it would make no odds to my life whatsoever if XL Bullies didn't exist!)