Under side of the bracelet, there should be two notches on each end of the ends. You’ll need a spring bar tool to remove the bracelet.

I have one but it doesn’t fit in.

You'll need a smaller one then! Try a Bergeon 6767F. The F denotes "Fine" and relates to the fork at the end. I've always found the 6767F to be more than adequate for any Breitling bracelet/strap.

Hi, you probably need to use a "precision" screwdriver with a very small end and use it inside the 2 notches on the endlinks. The Bergeon is ok when working with straps.
I did several times with the screwdriver and it's also the technique that my watchmaker recommended to use. Here is a video with the bergeon & breitling bracelet https://www.youtube.com/watch?v=9MgczVBrVGA.
I'm using a bergeon 3153 for straps and a precision screwdriver.

Yes I've also used a very small screwdriver for compressing springbar pins on bracelets and straps before too. It works well enough, but you just have to be very careful as a slip (and then a scratch) is much easier compared to using a proper tool. But you are correct that, with care and a bit of taping up of the lugs, a small screwdriver can work very nicely.

Why anyone would consider using a screwdriver to remove a springier is beyond me. The Bergeon 6767F is specifically designed to deal with springbars. It is like using an adjustable wrench to loosen a nut when you have the right socket and ratchet available. Sure, it may do the job, but you risk damaging what you are working on. I have never seen a watchmaker or sales associate use a screwdriver to remove springbars, to me you are just inviting trouble. Just my 2 cents on the subject.