9 silent V shaped craft in a V formation

On the 17th of August 2023 at around 23:00 My partner and I were sitting outside listening to music and watching the night sky as we often do in the summer months.
My partner was facing north, she first spotted the UAPs traveling towards her and shouted to me WOW what is that? While pointing up to the sky so I quickly turned around and managed to get a good look at the craft but only for a short time as they went out of sight over my house.
There were approximately 9 craft and flying in a V formation.
They were flying North.
They were completely silent.
They were V or triangular shaped.
I estimate around 100 meters from the ground.
I estimate they were travelling at around 30 kph.
I estimate the size of each craft being between 3 to 6 meters across.
As it all happened very fast we did not get chance to take any photos.
After the event we both scoured the internet trying to find something which looked similar shape and we came to the conclusion that they looked very much like the shape of a stealth bomber but smaller and completely silent.